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Browsing Research Articles (Sundaresan A.) by Author "Ghara, Somnath"

Browsing Research Articles (Sundaresan A.) by Author "Ghara, Somnath"

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  • Capacitive and magnetoresistive origin of magnetodielectric effects in Sm-substituted spiral antiferromagnet BiMnFe2O6 
    Ghara, Somnath; Yoo, Kyongjun; Kim, Kee Hoon; Sundaresan, A. (American Institute of Physics, 2015)
    BiMnFe2O6 exhibits a spiral antiferromagnetic ordering below 212K and a reentrant spin glass transition at 34 K. Further, magnetic and dielectric anomalies occur at the same temperature (T = 170 K) with a significant ...
  • Effect of internal electric field on ferroelectric polarization in multiferroic TbMnO3 
    De, Chandan; Ghara, Somnath; Sundaresan, A. (Pergamon-Elsevier Science Ltd, 2015)
    Pyro-current measurements have been widely used to study ferroelectric properties in multiferroic materials. However, determination of intrinsic polarization by this method is not straightforward because of leakage current ...
  • Is CH3NH3PbI3 Polar? 
    Sharada, G.; Mahale, Pratibha; Kore, Bhushan P.; Mukherjee, Somdutta; Pavan, Mysore S.; De, Chandan; Ghara, Somnath; Sundaresan, A.; Pandey, Anshu; Row, Tayur N. Guru; Sarma, D. D. (American Chemical Society, 2016)
    In view of the continued controversy concerning the polar/nonpolar nature of the hybrid perovskite system, CH3NH3PbI3, we report the first investigation of a time resolved pump probe measurement of the second harmonic ...
  • Large linear magnetoresistance in topological crystalline insulator Pb0.6Sn0.4Te 
    Roychowdhury, Subhajit; Ghara, Somnath; Guin, Satya N.; Sundaresan, A.; Biswas, Kanishka (Academic Press Inc Elsevier Science, 2016)
    Classical magnetoresistance generally follows the quadratic dependence of the magnetic field at lower field and finally saturates when field is larger. Here, we report the large positive non-saturating linear magnetoresistance ...
  • Magnetoelectric effect in simple collinear antiferromagnetic spinels 
    Saha, Rana; Ghara, Somnath; Suard, Emmanuelle; Jang, Dong Hyun; Kim, Kee Hoon; Ter-Oganessian, N. V.; Sundaresan, A. (American Physical Society, 2016)
    We report the discovery of the linear magnetoelectric effect in a family of spinel oxides, Co3O4 and MnB2O4 (B = Al, Ga) with simple collinear antiferromagnetic spin structure. An external magnetic field induces a dielectric ...
  • Reentrant spin-glass state and magnetodielectric effect in the spiral magnet BiMnFe2O6 
    Ghara, Somnath; Jeon, Byung-Gu; Yoo, Kyongjun; Kim, Kee Hoon; Sundaresan, A. (American Physical Society, 2014)
    The complex oxide BiMnFe2O6 crystallizing in a centrosymmetric orthorhombic structure (Pbcm) is known to exhibit a spiral antiferromagnetic ordering at T-N similar to 212 K and an anomaly in magnetization at low temperature ...
  • Structural and magnetic properties of a new and ordered quaternary alloy MnNiCuSb (SG: F(4)over-bar3m) 
    Haque, Zeba; Thakur, Gohil S.; Ghara, Somnath; Gupta, L. C.; Sundaresan, A.; Ganguli, A. K. (Elsevier Science Bv, 2016)
    We have synthesized a new crystallographically ordered quaternary Heusler alloy, MuNiCuSb. The crystal structure of the alloy has been determined by Rietveld refinement of the powder X-ray diffraction data. This alloy ...
  • Temperature dependent magnetic, dielectric and Raman studies of partially disordered La2NiMnO6 
    Kumar, Pradeep; Ghara, Somnath; Rajeswaran, B.; Muthu, D. V. S.; Sundaresan, A.; Sood, A. K. (Pergamon-Elsevier Science Ltd, 2014)
    We report a detailed magnetic, dielectric and Raman studies on partially disordered and biphasic double perovskite La2NiMnO6. DC and AC magnetic susceptibility measurements show two magnetic anomalies at T-C1 similar to ...

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