• 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 ...
• 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 ...
• Synthesis and Properties of Cobalt Sulfide Phases: CoS2 and Co9S8 

  Kumar, Nitesh; Raman, Natarajan; Sundaresan, A. (Wiley-V C H Verlag Gmbh, 2014)

  Single phase cobalt disulfide (CoS2) nanoparticles were prepared by thermal decomposition of cobalt-thiourea complex at a low temperature (400 degrees C). CoS2 nanoparticles exhibit ferromagnetic ordering at 122 K below ...
• Ti-rich double perovskites LnCu(3-y)Ti(2-x)Mn(2+x+y)O(12): ferrimagnetism and magnetoresistance up to room temperature 

  Seikh, Md. Motin; Caignaert, V.; Sundaresan, A.; De, Chandan; Raveau, B. (Royal Society of Chemistry, 2014)

  Ti-rich double perovskites LnCu(3-y)Ti(2-x)Mn(2+x+y)O(12) have been synthesized at normal pressure, with a wide homogeneity range, 0 < x < 0.5 and 0 < y <= 1. ALL these oxides are ferrimagnetic, with T-C ranging from 160 ...
• Synthesis, anion order and magnetic properties of RVO3-xNx perovskites (R = La, Pr, Nd; 0 <= x <= 1) 

  Oro-Sole, Judith; Clark, Lucy; Kumar, Nitesh; Bonin, William; Sundaresan, A.; Attfield, J. Paul; Rao, C. N. R.; Fuertes, Amparo (Royal Society of Chemistry, 2014)

  The rare earth vanadium oxynitride perovskites RVO3-xNx (R = La, Pr, Nd; 0 <= x <= 1) have been prepared by treatment of RVO4 precursors in NH3. The ammonolysis reactions proceed through an initial reduction of RVO4 ...
• Synthesis and Magnetic Properties of beta-KVOF3 

  Donakowski, Martin D.; Lu, Hongcheng; Gautier, Romain; Saha, Rana; Sundaresan, A.; Poeppelmeier, Kenneth R. (Wiley-V C H Verlag Gmbh, 2014)

  The potassium vanadium oxide-fluoride phase -KVOF3 was prepared by in-situ reduction with hydrothermal methods and characterized by single-crystal X-ray diffraction and magnetic susceptibility measurements. The compound ...
• The absence of ferroelectric polarization in layered and rock-salt ordered NaLnMnWO(6) (Ln = La, Nd, Tb) perovskites 

  De, Chandan; Kim, Tai Hoon; Kim, Kee Hoon; Sundaresan, A. (Royal Society of Chemistry, 2014)

  The ordered perovskites, NaLnMnWO(6) (Ln = La, Nd, Tb), are reported to exhibit simultaneous ordering of A-site cations (Na and Ln) in layered arrangement and B-site cations (Mn and W) in rock salt structure. They have ...
• Co-addition of nano-carbon and nano-silica: An effective method for improving the in-field properties of magnesium diboride superconductor 

  Thomas, Syju; Rahul, S.; Devadas, K. M.; Varghese, Neson; Sundaresan, A.; Syamaprasad, U. (Elsevier Science Sa, 2014)

  MgB2 superconductor sample co-doped with nano-carbon (n-C) and nano-silica (n-SiO2) is prepared and its structural and superconducting properties are compared with pure and n-C and nano SiC (n-SiC) mono-doped samples. ...
• Influence of preparation conditions on superconducting properties of Bi-2223 thin films 

  Mua, N. T.; Sundaresan, A.; Man, N. K.; Dung, D. D. (Indian Academy of Sciences, 2014)

  We report electrical transport properties of Bi2Sr2Ca2Cu3O10+x(Bi-2223) superconducting thin filmsfabricated by pulsed-laser deposition on SrTiO3 substrate. The aim of the study was to investigate the influence of preparation ...
• Novel features of multiferroic and magnetoelectric ferrites and chromites exhibiting magnetically driven ferroelectricity 

  Saha, Rana; Sundaresan, A.; Rao, C. N. R. (Royal Society of Chemistry, 2014)

  A few oxides such as YMnO3, TbMnO3, YMn2O5 and BiFeO3 constituted the small family of well-characterized multiferroics until recently, but this area of research has been enlarged significantly due to the advent of a novel ...
• Enhanced Thermal Oxidation Stability of Reduced Graphene Oxide by Nitrogen Doping 

  Sandoval, Stefania; Kumar, Nitesh; Sundaresan, A.; Rao, C. N. R.; Fuertes, Amparo; Tobias, Gerard (Wiley-V C H Verlag Gmbh, 2014)

  Nitrogen-doped reduced graphene oxide (N-doped RGO) samples with a high level of doping, up to 13 wt.%, have been prepared by annealing graphene oxide under a flow of pure ammonia. The presence of nitrogen within the ...
• 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 ...
• Magnetodielectric effects in A-site cation-ordered chromate spinels LiMCr4O8 (M = Ga and In) 

  Saha, Rana; Fauth, Francois; Avdeev, Maxim; Kayser, Paula; Kennedy, Brendan J.; Sundaresan, A. (American Physical Society, 2016)

  We report the occurrence of a magnetodielectric effect and its correlation with structure and magnetism in the A-site ordered chromate spinel oxides LiMCr4O8 (M = Ga, In). In addition to magnetic and dielectric measurements, ...
• 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 ...
• 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 ...
• Neutron scattering study of the crystallographic and spin structure in antiferromagnetic EuZrO3 

  Saha, Rana; Sundaresan, A.; Sanyal, Milan K.; Rao, C. N. R.; Orlandi, Fabio; Manuel, Pascal; Langridge, Sean (American Physical Society, 2016)

  High-resolution neutron powder diffraction is used to demonstrate that the Eu2+ moments in EuZrO3 are oriented along the c axis, in contrast to EuTiO3 where the moments lie within the ab plane. By applying a Landau theory ...
• Exchange bias at low fields exhibited by the interface between epitaxial layers of ferromagnetic and charge-ordered rare-earth manganites 

  Saha, Rana; Vasu, K.; Negi, D. S.; Datta, Ranjan; Sundaresan, A.; Rao, C. N. R. (Wiley-V C H Verlag Gmbh, 2016)

  Epitaxial thin films of ferromagnetic La0.7Sr0.3MnO3 (LSMO) and charge-ordered, antiferromagnetic Y0.5Ca0.5MnO3 (YCMO) were deposited on SrTiO3 (100) substrates by pulsed laser deposition (PLD). The heterostructure undergoes ...
• 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 ...
• 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 ...
• Rare earth (RE - Ce, Gd) modified Nd1-xRExFeAsO0.7F0.3 superconductor with enhanced magneto-transport properties 

  Aswathy, P. M.; Anooja, J. B.; Varghese, Neson; Chandrakanth, C. K.; Kumar, N. Devendra; Sundaresan, A.; Syamaprasad, U. (Royal Society of Chemistry, 2015)

  The influence of rare earth (RE - Ce, Gd) doping at the Nd site in the NdFeAsO0.7F0.3 superconductor wherein Ce and Gd have ionic radii in the order Ce > Nd > Gd is investigated. The structural and superconductivity ...

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