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Isaac Scientific Publishing
Journal of Advances in Nanomaterials
Prof. K.B.R. Varma,  Indian Institute of Science, Bangalore, India
Former Chairman
Materials Research Centre
Indian Institute of Science
Bangalore 560 012, India
Research Interests
Functional Ceramics,Glass-Ceramics, Single Crystal Growth,Ferroelectrics and Electro-Optics
Selected Publication List
• Linear and nonlinear optical properties of Tellurium Vanadate (Te2V2O9). S. P. P. Sadhu, T. Shet, B.K. Abhijit, A. Pradhan, M. Molli, V. S. Muthukumar and K.B.R. Varma Opt. Mater., 69, 128–133 (2017)
• Incipient ferroelectric to a possible ferroelectric transition in Te4+ doped calcium copper titanate (CaCu3Ti4O12) ceramics at low temperature as evidenced by Raman and dielectric spectroscopy N. Barman, P. Singh, C. Narayana and K. B. R. Varma AIP Adv., 7, 035105 (2017)
• Lithium ion conductivity and dielectric relaxation in dendritic nanostructured LiTaO3 glass–nanocrystal composites. P. W. Jaschin and K.B.R. Varma J. Appl. Phys., 121, 094101 (2017)
• Enhanced non-linear current-voltage response of Te-doped calcium copper titanate ceramics, N. Barman and K.B.R. Varma Ceram. Int., 43, 6363–6370 (2017)
Enhanced magnetic and dielectric properties of Ti-doped YFeO3 ¬ceramics. S. Madolappa, B. Ponraj, R. Bhimireddi and K. B. R. Varma J. Am. Cer. Soc., (2017), In-Press
• Enhanced dielectric properties and energy storage density of interface controlled ferroelectric BCZT-epoxy nanocomposites. S. P. P. Sadhu, S. Siddabattuni, B. Ponraj, M. Molli, V. S. Muthukumar and KBR Varma Composite Interfaces, 24, 663–675 (2016)
• Effect of nano- and micron-sized K0.5Na0.5NbO3 fillers on the dielectric and piezoelectric properties of PVDF composites Bharathi Ponraj, Rajasekhar Bhimireddi and K. B. R. Varma J Adv Ceram., 5, 308–320 (2016) DOI: 10.1007/s40145-016-0204-2
• A sonochemical approach for the synthesis of thermally stable mesoporous microspheres of TiO2 for use as high performance anodes for Li-ion batteries Satyendar Sunkara, N. Munichandraiah, K. B. R. Varma and S. A. Shivashankar New J. Chem., 40, 7197-7203 (2016)
• Grain size-dependent dielectric, piezoelectric and ferroelectric properties of Sr2Bi4Ti5O18 ceramics Tukaram Shet, Rajasekhar Bhimireddi, K. B. R. Varma J Mater. Sci., 51, 9253–9266 (2016)
• Nano/micro Sr2Bi4Ti5O18 crystallites: Size dependent structural, second harmonic and piezoelectric properties Shet Tukaram, Rajasekhar Bhimireddi, K.B.R. Varma Mater. Sci. Eng. B, 211, 101–109 (2016)
• Centrosymmetric tetragonal tellurium doped calcium copper titanate and its dielectric tenability N. Barman, S. Tripathi, N. Ravishankar, K.B.R Varma Solid State Comm., 241, 7–13 (2016)
• Reversible phase transition and relaxor behavior in Te2V2O9 single crystals grown by Czochralski technique Tukaram Shet, K.B.R. Varma J. Cryst. Growth, 449, 57–61 (2016)
• Improved electrical characteristics of Pr-doped BiFeO3 ceramics prepared by sol–gel route S. Madolappa, S. Kundu, R. Bhimireddi and K B R Varma Mater. Res. Express, 3, 065009 (2016)
• Structural, multiferroic properties and enhanced magnetoelectric coupling in Sm1−xCaxFeO3 K. Praveena, P. Bharathi, Hsiang-Lin Liu and K.B.R. Varma Ceram. Int., 42 13572–13585 (2016)
• Magnetic and ferroelectric characteristics of Gd3+ and Ti4+ co-doped BiFeO3 ceramics Shivanand Madolappa, A V Anupama, P W Jaschin, K B R Varma and B Sahoo Bull. Mater. Sci., 39, 593–601 (2016)
• Origin of giant dielectric constant and conductivity behavior in Zn1−xMgxO (0 ≤ x ≤ 0.1) ceramics C. Justin Raj, G. Paramesh, B. Shri Prakash, K.R.S. Preethi Meher and K.B.R. Varma Mater. Res. Bull., 74, 1–8, (2016)
Structural evolution and second harmonic properties of lithium niobate–tantalate nanocrystals embedded in a borate glass PW Jaschin and KBR Varma J. Non-Cryst. Solids, 434, 41-52, (2016)
• Growth Stress Induced Tunability of Dielectric Constant in Thin Films, KVLV Narayanachari, Hareesh Chandrasekar, Amiya Banerjee, K. B. R. Varma, Rajeev Ranjan, Navakanta Bhat, Srinivasan Raghavan J. Appl. Phys., 119, 014106 (2016)
• Structural, Optical, and Piezoelectric Response of Lead‐Free Ba0.95Mg0.05Zr0.1Ti0.9O3 Nanocrystalline Powder R. Bhimireddi, B. Ponraj, K. B. R. Varma J. Am. Ceram. Soc., 99, 896–904, (2016)
• Investigations into the structural and down-shifting and up-conversion luminescence properties of Ba2Na1−3xErxNb5O15 (0≤ x≤ 0.06) nanocrystalline phosphor synthesized via sol-gel route S. Kundu, R. Bhimireddi, K. Mishra, S. B. Rai, K. B. R. Varma Mater. Res. Express 2, 105015, (2015)
• Anomalous Dielectric Features and Structural Implications in Gallic Acid–Isoniazid Cocrystal Mediated by Lattice Water R. Kaur, B. Ponraj, D. Swain, K. B. R. Varma, T. N G. Row Cryst. Growth Des., 15, 4171–4176, (2015)
• Tuning of dielectric, pyroelectric and ferroelectric properties of 0.715Bi0.5Na0.5TiO3-0.065BaTiO3-0.22 SrTiO3 ceramic by internal clamping S. Patel, A. Chauhan, S. Kundu, N. A. Madhar, B. Ilahi, R. Vaish, K. B. R. Varma AIP Advances, 5, 087145 (2015)
• Effect of Fe doping on the magnetic ordering temperature of ErMnO3 A. Ahlawat, S. Satapathy, D. M. Phase, K. B. R. Varma, P. K. Gupta Appl. Phys. Lett. 106, 252903 (2015)
• Rapid and Facile One-Step Synthesis of LiTaO3 Nanorods P. W. Jaschin and K. B. R. Varma CrystEngComm, 17, 4642–4646, (2015)
• Piezoelectric properties of individual nanocrystallites of Ba0.85Ca0.15Zr0.1Ti0.9O3 obtained by oxalate precursor route P. Bharathi, P. Thomas and K. B. R. Varma J. Mater. Chem. C, 3, 4762–4770, (2015)
• Pyroelectric and Second Harmonic Response from LiTaO3 Nanocrystallites Evolved in Li2O–B2O3–Ta2O5 Glass System P. W. Jaschin and K. B. R. Varma CrystEngComm, 17, 2327–2335, (2015)
• TiO2 microcrystallized glass plate mediated photocatalytic degradation of estrogenic pollutant in water. H.S.Kushwaha, Gadige Parmesh, Rahul Vaish and K.B.R. Varma J. Non. Cryst. Solids, 408, 13–17,(2015)
• Frequency and Temperature-Independent Electrical Transport Properties of 2BaO–0.5Na2O–2.5Nb2O5–4.5B2O3 Glass-Ceramics Swarup Kundu and K. B. R. Varma J. Am. Ceram. Soc., 97[11], 3582–3588, (2014)
• Grain and the concomitant ferroelectric domain size dependent physical properties of Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics fabricated using powders derived from oxalate precursor route Bharathi P and K. B. R. Varma J. Appl. Phys., 116, 164107–1–10, (2014)
• Structural, Thermal and Electrical properties of Poly(methyl methacrylate)/ CaCu3Ti4O12 composites fabricated via melt mixing P. Thomas, R. S. Ernest Ravindran, K. B. R. Varma J. Therm. Anal. Cal. 115 [2] 1311–19 (2014)
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