Gunadhor Singh Okram, IITB PhD (Physics) UGC-DAE Consortium for Scientific Research University Campus, Khandwa Road, Indore 452001, Madhya Pradesh, India

Tel: +91-731-2463913, Fax: +91-731-2462294

Email: okram@csr.res.in, okramgs@gmail.com

https://scholar.google.co.in/citations?user=yP7mvgQAAAAJ

Present position

(2019, joined in 2001)

Scientist G

Education Jan 1989 – April 1995 PhD, Indian Institute of Technology, Bombay

Experimental studies of electron-doped (T’-type) superconductors

Supervisor: Late Professor Bhairaw Datta Padalia

July 1986 – July 1988 MSc, Physics, Delhi University, Delhi Special papers: Adv. SS Physics, Reactor Physics

Sep 1985 – July 1986 Bridge course, Physics, Delhi University, Delhi

Fellowships/ Scholarships

Jun 1999 – Jul 2001 SRA, NPL, CSIR, New Delhi Dec 1996 – Dec 1998 Sci. & Tech. Agency Fellowship, Govt. of Japan 1995 Young Scientist Award, Manipur Sci. Congress Oct 1995 – Nov 1996 NSC/IUAC New Delhi Nov 1993 – Sep 1995 DST Project No. SBR – 24 1987 (Jan 1989- Nov 1993) CSIR-UGC NET Fellowship 1985 - 1988 Manipur State Scholarship

Distinctions/ Awards

Award/ member Name of Academic course/ Body

Outstanding reviewer award: Jan 2017 Journal of Alloys and compounds, Elsevier

Outstanding reviewer award: Sep 2017 Materials Science & Engineering B, Elsevier

Nanotechnology and Nanomaterials, 2018, Barcelona, Spain Organizing Committee Member

National Seminar Cum Workshop in Nanoscience, NEHU 2018 Advisory committee member

International Conf. on Molecular Spectroscopy, Kerala 2017 National Advisory Committee Member

Young Scientist Award, 1995 Manipur Science Congress, MU, Imphal

Professional Training during PhD & PDF 11 - 22 Dec. 1989 Twin workshops on X-ray absorption fine structures, Rajasthan

University, Jaipur, India

26 Dec 1989 - 6 Jan 1990 Winter school on Superconductivity, TIFR, Mumbai, India

3 - 21 Dec 1990 5th SERC school on condensed matter physics, IIT, Bombay, India

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11 Feb – 1 March 1991 Experimental workshop on High Tc superconductors and related

materials, ICTP, Trieste, Italy.

2-4 Feb. 1994 Discussion meeting on the electro-magnetic response in high Tc

superconductors and magnetic materials, IISc, Bangalore, India.

30 Mar – 2 April 1998 Japanese Physical Society Meeting, Toho University and Nihon

University, Chiba, Japan

12-15 July 1998 International workshop on superconductivity: Materials and

Technology issues for HTS wires and bulk applications, , Naha,

Okinawa, Japan.

Post-doctoral Experience Nov 1995 – Nov 1996 Inter-University Accelerator Centre, New Delhi, India

Effect of heavy ion irradiation on materials/ superconductors

With Dr. Dinakar Kanjilal Dec 1996 – Dec 1998 National Institute of Materials Science, Tsukuba High Magnetic Field

Laboratory, Japan

High Tc superconductors in high magnetic fields

With Dr. Haruyoshi Aoki Jan 1999 – Aug 2001 National Physical Laboratory, New Delhi, India

Preparations and properties of high Tc superconductors With Dr. Anant V. Narlikar/ Dr. Ram Gopal Sharma

Research Experience PhD (2) and M. Phil. (6)/ M. Tech. (4)/ M. Sc. (38) / BSc (2) guided

PhD guided: 1. Dr. Ajay Soni on Study of physical properties of nanomaterials (Dec 2010); faculty at IIT, Mandi.

2. Dr. Jaiveer Singh (practical but unofficial), on Role of cappants on size and physical properties

of nickel nanoparticles (June 2016); faculty at IPS Academy, Indore.

Delivered over 65 invited lectures at national/ international conferences

Publications (cited 1179 times, h-index 17, up to 4 Oct 2019): 123 peer-reviewed journal

papers and 113 conference proceedings

Research Area and interest: Superconductivity (1990-2005) and nanostructured

thermoelectrics (2006-present)

Review of journal papers Applied Physics Letters, Scientific Reports, Journal of Applied Physics, Review of Scientific

Instruments, Optics communications, Recent Patents on Materials Science, Journal of Alloys

and compounds, Chinese J. Physics, Iranian J. Sci. Technology, Sci. Fed J. Nanotech Res. Lett.,

J. Magn. Magnetic Mater., Adv. Mater. Interfaces, Environm. Nanotech. Monitoring

Management, J. Sci: Adv. Mater. Devices and Polymer-Plastics Technology Materials; DAE

Solid State Physics symposium.

Teaching Experience: PhD course work

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Superconductivity; Nanostructured thermoelectrics

Professional membership Indian Physics Association (IND/LM/11966); Society for Materials Chemistry (LM-233),

India; Indian Science Congress Association (L15203); Materials Research Society of India

(LMB1398); Materials Research Society of Singapore; American Chemical Society, USA;

Physics Association of North East (PANE), India

Refereed Journal publications

Selected

High-yield multicomponent synthesis of triazolo[1,2-a] indazole-triones using silica-coated ZnO nanoparticles as heterogeneous catalyst in the presence of ultrasound

D. Verma, V. Sharma, G. S. Okram and S. Jain Green Chemistry 19, 5885 – 5899 (2017).

Ag-nanoinclusion-induced enhanced thermoelectric properties of ductile Ag2S Tarachand, B. Mukherjee, M. Saxena, G. S. Okram, S. Dam, S. Hussain, A. Lakhani, U. Deshpande, T. Shripathi

ACS Appl. Energy Mater. 2, 6383-6394 (2019). Enhanced Thermoelectric Properties of Se Deficient Layered TiSe2-x: A Charge Density Wave Material

R. Bhatt, S. Bhattacharya, R. Basu, S. Ahmed, A. Chauhan, G. S. Okram, P. Bhatt, M. Roy, M. Navaneethan, Y. Hayakawa, A. Debnath, A. Singh, D. Aswal, S. K. Gupta ACS Appl. Mater. Interfaces 6, 18619−18625 (2014).

A catalyst-free new polyol method synthesized hot-pressed Cu-doped Bi2S3 nanorods and their

thermoelectric properties

Tarachand, V. Sharma, R. Bhatt, V. Ganesan and G. S. Okram

Nano Research 9, 3291–3304 (2016).

Study of x CdI2-(100-x)[2Ag2O-(0.7V2O5-0.3B2O3)] electrolyte system for application in solid state primary battery

K. P. Padmashree, D. K. Kanchan, H. R. Panchal, K. Hariharan, G. S. Okram J. Power Sources 159, 742-746 (2006).

Naturally self-assembled nickel nanolattice

J. Singh, N. Kaurav, N. P. Lalla and G. S. Okram

J. Mater. Chem. C 2, 8918-8924 (2014).

Size-induced structural phase transition at ~6.0 nm from mixed fcc-Hcp to purely fcc structure in monodispersed nickel nanoparticles

Tarachand, V. Sharma, J. Singh, C. Nayak, D. Bhattacharyya, N. Kaurav, S. N. Jha, G. S. Okram J. Phys. Chem. C 120, 28354–28362 (2016).

Quantum size effect on the heat capacity of nickel nanolattice J. Singh, Tarachand, S. S. Samatham, D. Venkateshwarlu, N. Kaurav, V. Ganesan and G. S. Okram Appl. Phys. Lett. 111, 201904-1-4 (2017).

High Thermoelectric Figure of Merit in Nanocrystalline Polyaniline at low temperatures

C. Nath, A. Kumar, Y.-K. Kuo and G. S. Okram

Appl. Phys. Lett. 105, 133108 (2014).

Others

2019 Strategy for enhanced thermoelectric performance of Bi2S3 nanorods by Bi nanoinclusions Tarachand, G. S. Okram, B. K. De, S. Dam, S. Hussain, V. Sathe, U. Deshpande, A. Lakhani https://arxiv.org/submit/2721803/view.

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A Load-based Thermopower Measurement Setup in the Temperature Range of 5-330 K Tarachand, M. Saxena, B. Mukherjee, G. S. Okram

Rev. Sci. Instrum. 90, 063904 (2019); arXiv preprint arXiv:1903.04269 A simple method to fabricate metal doped TiO2 nanotubes

Aijo John K., J. Naduvath, S. K. Remillard, S. Shaji, P. A. DeYoung, Z. T. Kellner, S. Mallick, M. Thankamoniamma, G. S. Okram, R. R. Philip Chemical Physics 523, 198–204 (2019).

Ultrasound-assisted synthesis of 1, 8-Dioxodecahydro acridine derivatives in presence of Ag doped

CdS nanocatalyst

D. Verma, V. Sharma, S. Jain & G. S. Okram

J. Dispersion Sci. Technology. DOI: 10.1080/01932691. 2019.1614460

Influence of Al doping on the magnetoresistance and transport properties of La0.7Ba0.3Mn1− xAlxO3 (0≤

x≤ 0.15) manganites

D. K. Pandey, A. Modi, K. Dubey, P. Pandey, V. Sharma, G. S. Okram, N. K. Gaur

J. Magn. Magn. Mater. 471, 153-163 (2019).

A systematic study on effect of electron beam irradiation on electrical properties and thermopower

of RE0.8Sr0.2CoO3 (RE= La, Pr) cobaltites

B. Christopher, R. Thomas, A. Rao, G. S. Okram, V. C. Petwal, V. P. Verma.

Physica B: Condensed Matter 552, 170-177 (2019).

Investigation of the effect of electron beam irradiation on the structural and transport properties of half

doped Nd0.5Sr0.5MnO3 manganites

P. Chettri, U. Deka, A. Rao, G. S. Okram, V. C. Petwal, V. P. Verma, J. Dwivedi, R. Thomas, B. S.

Nagaraja

Physica B: Condensed Matter 560, 220-227 (2019).

2018 Thermoelectric properties of Ag-doped CuS nanocomposites synthesized by a facile polyol method

Tarachand, S. Hussain, N. P. Lalla, Y.-K. Kuo, A. Lakhani, V. G. Sathe, U. Deshpande and G. S. Okram PCCP 20, 5926-5935 (2018).

Tin-incorporated nanostructured copper indium oxide delafossite thin films: Structural, electrical and optical analysis

B. G. Nair, J. A. Joseph, Z.T. Kellner, V. Sharma, S.K. Remillard, P.A. DeYoung, G. S. Okram, V. Ganesan, R. R. Philip

J. Alloys Comp. 746 435-444 (2018). The effect of stoichiometry on the structural, thermal and electronic properties of thermally decomposed nickel oxide

P. Dubey, Netram Kaurav, Rupesh S. Devan, G. S. Okram and Y. K. Kuo RSC Adv. 8, 5882-5890 (2018).

Correlation between structural and transport properties of electron beam irradiated PrMnO3 compounds B. Christopher, A. Rao, B. S. Nagarajan, K. S. Prasad, G. S. Okram, G. Sanjeev, V. P. Petwal, V. P. Verma, J. Dwibedi and P. Poomesh Solid State Commun. 270, 30-37 (2018). Tuning of carrier type, enhancement of Linear magnetoresistance and inducing ferromagnetism at room temperature with Cu doping in Bi2Te3 Topological Insulators Singh, R. Singh, T. Patel, G. S. Okram, A. Lakhani, V. Ganesan, A. K. Ghosh, S. N. Jha, S. Patil and S. Chatterjee Mater. Res. Bulletin 98, 1-7 (2018). Surface colonized silver nanoparticles over chitosan poly-electrolyte micro-spheres and their multi-functional behavior B. Prakash, S. Asha, A. N. Ananth, G. Vanithakumari, G. S. Okram, S. P. Jose and M. A. J. Rajan Mater. Res. Express 5, 025032 (2018).

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Electrical, thermal and magnetic studies on 7.5 MeV electron beam irradiated PrCoO3 polycrystalline

samples. B. Christopher, A. Rao, U. Deka, Shyam Prasad K, G. S. Okram, G. Sanjeev, V. C. Petwal, V. P.

Verma, J. Dwivedi, Physica B: Condensed Matter 540, 26–32 (2018).

Effect of rare-earth substitution at La-site on structural, electrical and thermoelectric properties of La0.7-

xRExSr0.3MnO3 compounds (x = 0, 0.2, 0.3; RE = Eu, Gd, Y).

Y. R. S. Choudhary, S. Mangavati, S. Patil, A. Rao, B. S. Nagaraja, R. Thomas, G. S. Okram, S. G. Kini.

J. Magnetism and Magnetic Materials 451, 110–120 (2018).

Preparation of n-type Copper Gallium Selenide thin films by tin doping and analysis of its structural,

electrical, optical and transport properties.

A. Abraham, Keerthi K., G. S. Okram, V. Sharma, R. R. Philip.

Materials Chemistry and Physics 215, 56–61 (2018). Magnetic and transport properties driven by Sr substitution in polycrystalline Pr1-xSrxCoO3 (0.1 ≤ x ≤ 0.5) cobaltites. A. Modi, M. A. Bhat, S. Bhattacharya, G. S. Okram, N. K. Gaur. J. Appl. Phys. 123, 205114 (2018).

2017 Effect of Rare Earth Ionic Radii on Structural, Electric, Magnetic and Thermoelectric Properties of REMnO3 (RE = Dy, Gd, Eu and Sm) Manganites

B. S. Nagaraja, A. Rao. P. Poornesh, G. S. Okram J. Supercond. Novel Magn. 3, 1-11 (2017).

Colossal thermopower, spin states and delocalization effects in single layered La2−xSrxCoO4 A. Ahad, D. K. Shukla, F. Rahman, S. Majid, Tarachand, G. S. Okram, A. K. Sinha, D. M. Phase

Acta Materialia 135, 233-243 (2017). Ionic Conductivity and Power Conversion Efficiency Study of KI Incorporated Glucosyl Carboxonium Ion Based Biopolymer Crust Electrolyte

E. Bementa, G. S. Okram & M. A. J. Rajan Polymer-Plastics Technol. Engineering 57, 1303–1312 (2018).

Growth Mechanism of Pine-leaf-like Nanostructure from the Backbone of SrCO3 Nanorods using LaMer’s Surface Diffusion: Impact of Higher Surface Energy (γ = 38.9 eV/nm2) {111} Plane Stacking Along ⟨110⟩ (γ = 3.4 eV/nm2) by First-Principles Calculations

D. Arumugam, M. Thangapandian, J. L. J. Mathavan, A. Jayaram, M. Palanichamy, S. S. Chandrasekaran, U. Subramanian, M. Gupta, G. S. Okram, M. A. Jothirajan and M. F. B. Amirtham

Cryst. Growth Des. 17, 6394−6406 (2017). Investigation on structural, electrical, magnetic and thermoelectric properties of low bandwidth Sm1-

xSrxMnO3 (0.2≤x≤0.5) manganites B. S. Nagaraja, A. Rao, P. Poornesh, Tarachand and G. S. Okram Physica B 523, 67–77 (2017).

Influence of Particle Size and Dielectric Environment on Dispersion Behaviour and Surface Plasmon in Nickel Nanoparticles

V. Sharma, C. Chotia, Tarachand, V. Ganesan and G. S. Okram PCCP 19, 14096-14106 (2017).

Studies on Photoresponse and LPG sensitivity of transparent Al doped ZnO thin films prepared by thermal evaporation technique

N. H. Sheeba, S. C. Vattappalam, G.S Okram, V. Sharma, P.V. Sreenivasan, S. Mathew, R. R. Philip

Mater. Res. Bulletin 93, 130–137 (2017). Comprehensive study on effect of electron beam irradiation on electrical, thermo-electric and magnetic properties of oxygen rich LaMnO3.15 compound

B. Christopher, A. Rao, G. S. Okram, V. C. Petwal, V. P. Verma, and J. Dwivedi J. Alloys Comp. 703, 216-224 (2017).

Structural, electrical, magnetic and thermal transport properties of polycrystalline R0.8Sr0.2CoO3 (R = Pr & Nd)

A. Modi, M. A. Bhat, Tarachand, S. Bhattacharya, G. S. Okram, N. K. Gaur J. Magn. Magn. Mater. (ICMAGMA-2017).

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Structural, magnetotransport and thermal properties of Sm substituted La0.7-xSmxBa0.3MnO3 (0 ≤ X ≤

0.2) manganites

Anchit Modi, Masroor Ahmad Bhat, Devendra K. Pandey, Tarachad, Shovit Bhattacharya, N. K.

Gaur, G. S. Okram

J. Magn. Magn. Mater. 424, 459- 466 (2017).

Impact of silver substitution on the magnetotransport and thermal behavior of polycrystalline

Sm0.55Sr0.45-xAgxMnO3 (x = 0 & 0.15) manganites

M. A. Bhat, A. Modi, Tarachand, S. Bhattacharya, N. K. Gaur, G. S. Okram

J. Alloys Comp. 691, 230-238 (2017).

2016

Electric, magnetic, and thermo-electric properties of Cr doped La0.8Ca0.2Mn1-xCrxMnO3 manganites

S. O. Manjunatha, A. Rao, P.D. Babu, TaraChand, G.S. Okram

Solid State Commun. 239, 37-43 (2016).

Induced Aggregation of Steric Stabilizing Anionic-Rich 2-Amino-3-chloro-5-trifluoromethylpyridine on CeO2 QDs: Surface Charge and Electro-Osmotic Flow Analysis

D. Arumugam, M. Thangapandian, A. Jayaram, G. S. Okram, N. P. Lalla and M. F. B. Amirtham J. Phys. Chem. C 120, 26544−26555 (2016).

Electrical and transport properties of nearly stoichiometric transparent n-type silver indium oxide thin films

K. Keerthi, P. Tarachand, G. S. Okram, T. Shripathi, V. Ganesan, B. G. Nair, A. Abraham and R. R. Philip

Phys. Status Solidi B 253, 2230-2235 (2016). Impact of silver substitution on the magnetotransport and thermal behavior of polycrystalline Sm0.55Sr0.45−xAgxMnO3 (x = 0 & 0.15) manganites

M.A. Bhat, A. Modi, Tarachand, S. Bhattacharya, N. K. Gaur, G.S. Okram J. Alloys Comp. 691, 230-238 (2016).

Structural, electrical, magnetic and thermal studies on Eu1-xSrxMnO3 (0.2 ≤ x ≤ 0.5) manganites B.S. Nagaraja, Ashok Rao, G.S. Okram

J. Alloys Comp. 683, 308-317 (2016). A systematic study on the effect of electron beam irradiation on structural, electrical, thermo-electric power and magnetic property of LaCoO3

C. J. Benedict, A. Rao, G. Sanjeev, G. S. Okram, P.D. Babu J. Magn. Magn. Mater. 397, 145-151 (2016).

Influence of electron beam irradiation on the structural, electrical and thermal properties of Gd0.5Sr0.5MnO3 and Dy0.5Sr0.5MnO3 manganites

B.S. Nagaraja, Ashok Rao, P.D. Babu, G. Sanjeev, G.S. Okram Nuclear Instru. Methods Phys. Res. B 366, 188–197 (2016).

Role of iso-electronic Ru5+ in thermal transport behavior of YMn1-xRuxO3 compounds. R. K. Thakur, R. Thakur,

N. Kaurav, V. Ganesan, G. S. Okram, N. K. Gaur, J. Alloys and Compd. 688, 280-287 (2016). Large power factor and anomalous Hall effect and their correlation with observed linear magnetoresistance in Co-doped Bi2Se3 3D topological insulator

R. Singh, K. K. Shukla, A. Kumar, G. S. Okram, D. Singh, V. Ganesan, A. Lakhani, A. K. Ghosh and S. Chatterjee

J. Phys.: Condens. Matter 28, 376001 (2016) (6pp). Low temperature electrical conductivity and Seebeck coefficient of nanostructured CuSe thin films with Ga addition

Anitha Abraham, Tarachand, G. S. Okram, Rajani Jacob, P.V. Sreenivasan, Rachel Reena Philip Vacuum 129, 74-78 (2016).

2015

Anomalous thermopower in bismuth doped La–Li–Mn–O manganite

K. L. Yanapu, G. S. Okram, V. R. Paduru

Phys. Lett. A 379, 175–178 (2015).

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Tin Incorporation in AgInSe2 Thin Films: Influence on Conductivity R. Jacob, G. S. Okram, J. Naduvath, S. Mallick and R. R. Philip J. Phys. Chem. C 119, 5727-5733 (2015).

Structural, electrical, magnetic and thermal properties of Gd1-xSrxMnO3 (0.2≤x≤0.5) manganites

B. S. Nagaraja, A. Rao, P. D. Babu and G.S. Okram

Physica B Condensed Matter 479, 10-20 (2015).

Electrical, thermal and magnetic studies on Bi-substituted LSMO manganites M. D. Daivajna, A. Rao, and G. S. Okram J. Magn. Magn. Mater. 388, 90-95 (2015).

A comparative study of HoSn1.1Ge0.9 and DySn1.1Ge0.9 compounds using magnetic, magneto-thermal and magneto-transport measurements

S. Gupta, V.R. Reddy, G.S. Okram, K. G. Suresh J. Alloys Comp. 625, 107-112 (2015).

Investigation on structural, magneto-transport, magnetic and thermal properties of La0.8Ca0.2-

xBaxMnO3 (0 ≤ x ≤ 0.2) manganites S.O. Manjunatha, A. Rao, Subhashini & G.S. Okram

J. Alloys Comp. 640, 154–161 (2015). Investigation on magnetic, electrical and thermoelectric power of Bi- substituted La0.8Ca0.2MnO3 manganites

S.O. Manjunatha, A. Rao, V. P. S. Awana, & G. S. Okram

J. Alloys Comp. 394, 130–137 (2015).

Structural, Electrical, and Colossal Thermoelectric Properties of Dy1-xSrxMnO3 Manganites B. S. Nagaraja, Ashok Rao, and G. S. Okram

J. Supercond. Novel Magn. 28, 223–229 (2015).

Studies on magneto-resistance, magnetization and thermoelectric power of Cr substituted

La0.65Ca0.35Mn1-xCrxO3 (0 ≤ x ≤ 0.07) manganites

Manjunath S. O., A. Rao, P. D. Babu, Tarachand & G. S. Okram

Physica B 475, 1-9 (2015).

G. S. Okram, J. Singh, N. Kaurav and N. P. Lalla Trioctylphosphine as self-assembly inducer Faraday Discussions 181, 211 – 223 (2015).

Effect of Electron Beam Irradiation on Structural, Electrical and Thermoelectric Power of La0.8Sr0.2MnO3

A. Rao, J. B. Christopher, G. Sanjeev, G.S. Okram J. Nano- and Electronic Phys. 7, 01001 (5pp) (2015).

2014

Influence of surfactants on the electrical resistivity and thermopower of Ni nanoparticles.

N. Kaurav, G. S. Okram and V. Ganesan

Mater. Res. Express 1, 045014-1-13 (2014).

Low temperature thermopower and electrical conductivity in highly conductive CuInO2 thin films

B. G. Nair, G. S. Okram, J. Naduvath, T. Shripathi, A. Fatima, T. Patel, R. Jacob, K. Keerthi, S.

K. Remillard and R. R. Philip

J. Mater. Chem. C 2, 6765–6772 (2014).

Optical and electrical properties and phon drag effect in low temperature TEP measurements of

AgSbSe2 thin films

T. N. Asokan, K. S. Urmila, R. Jacob, R. R. Philip, G. S. Okram, V. Ganesan, and B. Praddeep

J. Semiconductors 5, 052001-1-6 (2014).

Electrical, Thermal and magnetic properties of Bi-doped La0.7-xBixSr0.3MO3 manganites

M. D. Daivajna, A. Rao and G. S. Okram

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J. Alloys Comp. 617, 345-351 (2014).

Structural and Thermal Properties of YMn1-xRuxO3 R. K. Thakur, R. Thakur, N. Kaurav, G. S. Okram and N. K. Gaur

Advanced Materials Research 975, 69-72 (2014). Transport Properties of Hexagonal YMn0.9Ru0.1O3 Compound. R. K. Thakur, R. Thakur, N. Kaurav, A. Modi,

G.S. Okram, N.K.Gaur, Advanced Materials Research 1047 151-154 (2014).

Highly conductive n- and p-type CuInO thin films by reactive Evaporation Surya A. Mary, B. G. Nair, J. Naduvath, G. S. Okram, S. K. Remillard, P.V. Sreenivasan and R. R. Philip

J. Alloys Comp. 600, 159–161 (2014). K. S. Urmila, T. N. Asokan, R. R. Philip, V. Ganesan, G. S. Okram, and B. Pradeep

Structural, optical, electrical and low temperature thermoelectric properties of degenerate polycrystalline Cu7Se4 thin films Phys. Status Solidi B 251, 689–696 (2014).

Synthesis, characterization and dielectric properties of nanocrystalline nickel S. Das, N.P. Lalla, G. S. Okram

Ind. J. Pure Appl. Phys. 52, 386-390 (2014). 2013

Low temperature thermoelectric properties of Cu intercalated TiSe2: a charge density wave material R. Bhatt, R. Basu, S. Bhattacharya, A. Singh, D. K. Aswal, S. K. Gupta, G.S. Okram, V. Ganesan, D. Venkateshwarlu, C. Surgers, M. Navaneethan, and Y. Hayakawa

Appl. Phys. A 111, 465-470 (2013). Dielectric, magnetic, and thermodynamic properties of Y1−xSrxMnO3 (x =0.1 and 0.2)

R. K. Thakur, R. Thakur, S. S. Samatham, N. Kaurav, V. Ganesan, N. K. Gaur and G. S. Okram J. Appl. Phys. 112, 104115-1-6 (2012).

2012

Effect of Co-doping on the resistivity and thermopower of SmFe1-xCoxAsO (0.0≤x≤0.3) G. S. Okram, N. Kaurav, A. Soni, A. Pal and V.P.S. Awana

AIP Advances 2, 042137(1-7) (2012). Observation of Intermediate Bands in Eu3+ Doped YPO4 Host: Li+ Ion Effect and Blue to Pink Light Emitter

A. K. Parchur, A. I. Prasad, S. B. Rai, R. Tewari, R. K. Sahu, G. S. Okram, R. A. Singh and R. S. Ningthoujam

AIP Advances 2, 032119 (2012) (17pages). Intrinsic thermopower of Group VB metals

G. S. Okram AIP Advances 2, 012178(1-9) (2012).

Optoelectronic and low temperature thermoelectric effects in the OVC n-CuIn3Se5 thin films R. Jacob, R. Geethu, T. Shripathi, G. S. Okram, V. Ganesan, B. Pradeep, K. S. Urmila and R. R. Philip

Phys. Status Solidi A 209, 2195–2200 (2012). Dielectric, magnetic, and thermodynamic properties of Y1−xSrxMnO3 (x= 0.1 and 0.2).

R. K. Thakur, R. Thakur, S. S. Samatham, N. Kaurav, V. Ganesan, N. K. Gaur and G.S. Okram,

J. Appl. Phys. 112 (2012) 104115.

Structural, optical, electrical and low temperature thermoelectric studies on the ordered vacancy compound AgGa3Se5

J. Rajni, R. Geethu, T. Shripathi, G. S. Okram, V. Ganesan, B. Pradeep, K. S. Urmila and R. R. Philip

Phys. Status Solidi B 249, 1271–1276 (2012). Optoelectronic and Thermoelectric properties in Ga Doped b- PbS2 nanostructured thin films

R. Geethu, R. Jacob, T. Shripathi, G. S. Okram, V. Ganesan, S. Tripathi, A. Fatima, Sreenivasan P.V, Urmila K. S, B. Pradeep, R. R. Philip

Appl. Surf. Sci. 258, 6257-6260 (2012).

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2011 Magneto-resistance, thermal conductivity, thermoelectric power and specific heat of superconductor Gd0.95Pr0.05Ba2Cu2.94M0.06O7-δ (M = Fe, Ni, Zn and Mn)

T. Chakraborty, B. Gahtori, A. Soni, G. S. Okram, S. K. Agrawal, S-Y. Chen, Y-K. Kuo, M. A. H. Ahsan and A. Rao

Solid State Commun. 151, 1117-1121 (2011). Size-dependent resistivity and thermoelectricity of Cu nanoparticles

G. S. Okram and N. Kaurav J. Appl. Phys. 110, 023713 (1-9) (2011).

Luminescence property in Eu3+ doped CaMoO4 nanophosphors A. K. Parchur, R. S. Ningthoujam, S. B. Rai, G. S. Okram, R. A. Singh, M. Tyagi, R. Tewari and R. K. Vatsa

Dalton Transactions 40, 7595-7601 (2011). The pH-controlled particle size tuning of nanocrystalline Ni in polyol synthesis method without additional cappant

G. S. Okram, A. Soni and R. Prasad Adv. Sci. Lett. 4, 132–135 (2011).

High Coercive Field and Magnetization Reversal in Core-shell Cum Nanotwin Driven Ni/NiO Nanospheres

G. S. Okram, A. Soni, D. T. Adroja, N. P. Lalla, T. Shripathi J. Nanosci. Nanotechnol. 11, 2632-2635 (2011).

2010

The unusual electrical response in polyaniline - threonine composites T. Mathavan, S. Umapathy, M. A. Jothirajan, M. F. Parveen, T. S. Vivekanandam , A. Soni, G. S. Okram and V. Ganesan

Mater. Lett. 64, 2009-2011 (2010). Electrical and thermal properties of bulk superconductors Eu0.95Pr0.05Ba2(Cu1-xMx)3O7-δ (M = Fe, Ni, Zn and Mn)

T. Chakraborty, B. Gahtori, A. Soni, G. S. Okram, S. K. Agarwal, Y-S. Chen, Y-K. Kuo, Geetha, Ashok Rao, C. K. Sarkar

Physica C: Superconductivity 470 (2010) 244–249. Negative thermoelectric power of over-doped Bi2Sr2CaCu2O8 superconductor

J. K. Bains, M. Mudgel, G.S. Okram, A. Soni, V.P.S. Awana, P.K. Ahluwalia, R. B. Saxena, and H. Kishan

Physica C: Superconductivity 470, S203-S204(2010). 2009

Anomalous Thermoelectric power of over-doped Bi2Sr2CaCu2O8 superconductor V. P. S. Awana, J. K. Bains, G. S. Okram, A. Soni, H. Kishan

J. Appl. Phys. 106, 096102 (2009). Electrical properties of polyaniline doped with metal ions

J. B. M. Krishna, A. Saha, G. S. Okram, A. Soni, S. Purakayastha and B. Ghosh J. Phys. D: Appl. Phys. 42, 095404-10 (2009).

Influence of traps on charge transport in metal ion doped polyaniline J. B. M. Krishna, A. Saha, G. S. Okram, S. Purakayastha and B. Ghosh

J. Phys. D: Appl. Phys. 42, 115102-8 (2009). Size Dependent Thermopower in Nanocrystalline Nickel

A. Soni and G. S. Okram Appl. Phys. Lett. 95, 013101 (2009): Got selection for the July 20, 2009 issue of Virtual Journal of Nanoscale Science & Technology.

2008

Grain size effect on lattice of Ni nanocrystals prepared through polyol method G. S. Okram, K. N. Devi, H. Sanatombi, A. Soni, V. Ganesan, D. M. Phase

J. Nanosci. Nanotechnol. 8, 4127- 4131 (2008).

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Thickness dependent structural, electronic and optical properties of Ge- nanostructures S. Tripathi, R. Brajpuriya, A. Sharma, A. Soni, G. S. Okram, S. M. Chaudhari, T. Shripathi

J. Nanosci. Nanotechnol. 8, 2955–2963 (2008). Sonochemical Synthesis of Poly(Methyl Acrylate)

M. A. J. Rajan, T. Mathavan, T. S. Vivekanam, S. Umapathy, V. Ganesan, G. S. Okram, A. Soni Solid State Phenomena 136, 175-190 (2008).

Resistivity and thermopower measurement setups in the Temperature range of 5–325 K A. Soni and G. S. Okram

Rev. Sci. Instrum. 79, 125103 (2008). Anomalous electrical transport behavior in nanocrystalline nickel. G. S. Okram, A. Soni, R. Rawat. Nanotechnology 19, 185711 (2008). IF 3.404

Low-temperature electrical resistivity of cupric telluride (CuTe) thin films. K. Neyvasagam, N. Soundararajan, A. Soni, G. S. Okram, and V. Ganesan. Phys. stat. sol. (b) 245, 77–81 (2008).

2007

Electrical properties of chemically prepared nonstoichiometric CuIn(S,Se)2 thin films R. H. Bari, L. A. Patil, A. Soni, and G. S. Okram

Bull. Mater. Sci. 30, 135–139 (2007). (National). Ammoximation of Cyclohexanone over nanoporous TS-1 using UHP as an Oxidant

S. Saxena, J. Basak, N. Hardia, R. Dixit, S. Bhadauria, R. Dwivedi, R. Prasad, A. Soni, G. S. Okram, and A. Gupta

Chemical Engg. J. 132, 61 (2007). Preparation and characterization of nanocrystalline CdSe

N. S. Singh, W. S. Singh, S. D. Singh, and G. S. Okram Indian J. Phys. 81, 27-33 (2007).

Transport, magnetic and thermal properties of La0.88Ca0.12MnO3 single crystal A. Bodhaye, S. P. Sanayal, and G. S. Okram, and Y. M. Mukovskii

Indian J. Pure Appl. Phys. 45, 37-39 (2007). (National). Vortices in Layered Superconductors

G. S. Okram Intl. J. Cond. Matter, Adv. Mater. Superconductivity Res. (Nova Science Publishers, Inc. NY, USA) 7, 101-145 (2007): Book Chapter.

2006

Electrical conductivity and thermoelectric power of a-Ge20Se80-xBix thin films P. Sharma, M. Vashistha, G. S. Okram, I. P. Jain

J. Electroceramics 16, 549-552 (2006). 2005

Effect of Gd2BaCuO5 Nanoparticles on Irreversibility Fields of Melt-textured (Nd-Sm-Gd)Ba2Cu3O7-δ G. S. Okram, M. Muralidhar, and M. Murakami

Supercond. Sci. Technology 18, 1060-1064 (2005). Modifications of ZnO thin films under dense electronic excitation

P. M. R. Kumar, C. S. Kartha, K. P. Vijayakumar, F. Singh, D. K. Avasthi, G. S. Okram, M. Kumar, and S. Kumar

J. Appl. Phys. 97, 13509-13509-6 (2005).

2004

Investigations of Electrical properties in CuInSe2 and related ordered vacancy compounds R. R. Philip, B. Pradeep, G. S. Okram and V. Ganesan

Semicond. Sci. Technology 19, 798-806 (2004). Influence of Gd2BaCuO5 fine particles on thermoelectric power in melt-textured (Nd-Sm-Gd)Ba2Cu3O7-

δ G.S. Okram, M. Muralidhar, M. Jirsa, and M. Murakami

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Physica C: Superconductivity 402, 94-97 (2004). 2001

Vortex types and their phase diagram in Tl2Ba2CuO6 Single Crystals G. S. Okram, H. Aoki, M. Xu, D. G. Hinks, and T.W. Li

Solid State Commun. 118, 47-51 (2001). Dimensionality and Lock-in Transition in Tl2Ba2CuO6 Single crystals

G. S. Okram, C. Terakura, S. Uji, H. Aoki, M. Xu, and D.G. Hinks Superond. Sci. Technology 14, 452-456 (2001).

Vortex Lock-in Transition in Tl2Ba2CuO6 Superconductor and Vortex phase Diagram G. S. Okram, H. Aoki, M. Xu, and D. G. Hinks

Physica C 355, 65-76 (2001). Irreversibility line and Lock-in Transition in Tl2Ba2CuO6 Single crystals

G. S. Okram, C. Terakura, S. Uji, H. Aoki, M. Xu, and D. G. Hinks Physica C 356, 115-121 (2001).

1999

Negative Curvature of Upper Critical Fields and Dimensional Cross-over in YBa2Cu3O7- Thin Films G. S. Okram, H. Aoki, and K. Nakamura

Solid State Commun. 110, 327-331 (1999). MeV Si-ion Irradiation Induced Tc Enhancement in YBCO Thin Films

N. C. Mishra, D. Behera, T. Mohanty, K. Patnaik, L. Senapati, O. G. Singh, D. Kanjilal, G. K. Mehta, and R. Pinto Modern Phys. Lett. B 13, 79–87 (1999).

1998

X-ray absorption near-edge structure Study of T’-type Revived Superconducting Compounds,

Nd1.82-zAzCe0.18CuOy (NACCO); A = Ca, Sr or Ba, z0.18 B. D. Padalia, G. S. Okram, Om Prakash, S.J. Gurman, and J.C. Amiss Supercond. Sci. Technology 11, 1381-1385 (1998).

1997

The Paramagnetic Meissner Effect in Nd2-xCexCuOy superconductors at 40G and Flux Trapping G. S. Okram, D. T. Adroja, B. D. Padalia, Om Prakash, and P.A.J. de Groot

J. Phys.: Condens. Matter 9, L525-L531 (1997). Possible Competitive Electron- and hole-like Conduction in the Revived Nd1.82Ce0.18CuOy Superconductors

G. S. Okram, B. D. Padalia, Om Prakash, S. K. Agarwal, and A.V. Narlikar Physica C 277, 19-23 (1997).

Local Structures Around Cations in the T’-type Nd(Ce) based Superconducting system: an EXAFS study

B. D. Padalia, G. S. Okram, Om Prakash, S.J. Gurman, and J.C. Amiss. J. Phys.: Condens. Matter 9, 9695-9714 (1997).

1996

Direct Evidence for Local Oxygen Non-Stoichiometry in Nd2-xCexCuOy: A High Resolution ASEM Study

Okram G. Singh1, C. S. Harendranath, Om Prakash, and B. D. Padalia Solid State Commun. 100, 721-725 (1996).

Thermoelectric Power of Nd1.82-xSrxCe0.18CuOy, x0.18 Superconductors

1Gunadhor Singh Okram has been in regular use since October 1996 instead of Okram Gunadhor Singh

as declared through Notary Public and News Paper.

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Okram G. Singh, B. D. Padalia, Om Prakash, S. K. Agarwal, and A.V. Narlikar J. Appl. Phys. 80, 5169-5173 (1996).

1995

XANES Studies of the Nd-Sr-Ce-Cu-O Superconducting System B. D. Padalia, Okram G. Singh, S.J. Gurman, K. Suba, and Om Prakash

Physica B 208 & 209, 533-535 (1995).

EXAFS Studies of Electron-doped Nd1.82-xMxCe0.18CuOy: M = Ba, Sr or Ca, x0.18 B. D. Padalia, Okram G. Singh, S.J. Gurman, J.C. Amiss, and Om Prakash Physica B 208 & 209, 531-532 (1995).

1994

Phase Diagram For The Electron-doped Nd2-xCexCuOy Superconducting System Okram G. Singh, B. D. Padalia, Om Prakash, K. Suba, A.V. Narlikar, and L.C. Gupta

Physica C 219, 156-161 (1994). On the Substitution of Lithium in Copper Oxide

K. Suba, Okram G. Singh, B. D. Padalia, Om Prakash, D. Chandrasekharam, and M.R. Udupa, Materials Res. Bulletin 29, 443-450 (1994).

Thermoelectric Power Studies of Nd1.82-xSrxCe0.18CuOy Superconducting System Okram G. Singh, B. D. Padalia, Om Prakash, V.N. Moorthy, and A.V. Narlikar

J. Appl. Phys. 75, 6740 (1994). (Abstract) Evidence For The Revival Of Superconductivity In Nd1.82Ce0.18CuO4-δ By Doping With Divalent Alkaline Earth Elements

Okram G. Singh, Om Prakash, B. D. Padalia, and A.V. Narlikar Phys. Rev. B (Rapid) 48, 13182-13183 (1993).

1992

Effect of Oxygen Stoichiometry variation on Tc in Nd1.85Ce0.15CuO4-δ G. S. Okram, Om Prakash, B.D. Padalia, D. Chandrasekharam, A.S. Tamhane, and L.C. Gupta Supercond. Sci. Technol. 5, 561 - 563 (1992).