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Browsing Physics by Author "Das, A."

Browsing Physics by Author "Das, A."

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  • Absence of first order magnetic transition, a curious case of Mn3InC 
    Dias, E.T.; Das, A.; Hoser, A.; Emura, S.; Nigam, A.K.; Priolkar, K.R. (Journal of Applied Physics. 125; 2019; ArticleID_063904.)
    The volume expanding magnetostructural transition in Mn3GaC and Mn3SnC has been identified to be due to distortion of Mn6Coctahedra. Despite a similar lattice volume as Mn3SnC and similar valence electron contribution to ...
  • Cluster mean field plus density matrix renormalization theory for the Bose Hubbard models 
    Gaude, P.P.; Das, A.; Pai, R.V. (Journal of Physics A: Mathematical and Theoretical. 55(26); 2022; ArticleID_265004.)
    The cluster mean-field with density matrix renormalization (CMFT + DMRG) method which combines the simplicity of the mean-field theory and the numerical power of the density-matrix renormalization group method is applied ...
  • Cluster mean field theory for 2-dimensional spin-1 Bose Hubbard model 
    Alavani, B.K.; Das, A.; Pai, R.V. (Journal of Physics B: Atomic, Molecular and Optical Physics. 51(14); 2018; ArticleID_145302.)
    The Cluster Mean Field Theory(CMFT) for 2-dimensional Spin-1 Bose-Hubbard model is applied to study the superfluid (SF) to Mott insulator (MI) phase transitions and various magnetic phases, that arise in the presence of ...
  • Disorder induced negative magnetization in LaSrCoRuO(6) 
    Murthy, P.S.R.; Priolkar, K.R.; Bhobe, P.A.; Das, A.; Sarode, P.R.; Nigam, A.K. (Journal of Magnetism and Magnetic Materials 322(22); 2010; 3704-3709.)
    This paper reports effect of thermally induced disorder on the magnetic properties of LaSrCoRuO6 double perovskite. While the ordered sample is antiferromagnetic, the disordered sample exhibits negative values of magnetization ...
  • Effect of B-site dopants on magnetic and transport properties of LaSrCoRuO(6) 
    Murthy, P.S.R.; Priolkar, K.R.; Bhobe, P.A.; Das, A.; Sarode, P.R.; Nigam, A.K. (European Physical Journal B. 78(3); 2010; 275-282.)
    Effect of Co, Ru and Cu substitution at B and B' sites on the magnetic and transport properties of LaSrCoRuO(6) have been investigated. All the doped compositions crystallize in the monoclinic structure in the space group ...
  • Effect of local structural distortions on magnetostructural transformation in Mn(3)SnC 
    Dias, E.T.; Priolkar, K.R.; Das, A.; Aquilanti, G.; Cakir, O.; Acet, M.; Nigam, A.K. (Journal of Physics D-Applied Physics. 48; 2015; ArticleID 295001.)
    In this paper we attempt to understand the different nature of first order magnetic transformation in Mn(3)SnC as compared to that in Mn(3)GaC. The transformation in Mn(3)SnC is close to room temperature (T sub(t) approx ...
  • Infrared absorption study of charge ordered La(0.5)Ca(0.5-x)Sr(x)MnO(3) (0.1 less than or equal to x less than or equal to 0.5) manganites 
    Dhiman, Indu; Das, A.; Priolkar, K.R.; Murthy, P.S.R. (Physica B-Condensed Matter. 406(4); 2011; 1028-1033.)
    Infrared absorption study has been carried out on a series of half doped manganites, La(0.5)Ca(0.5-x)Sr(x)MnO(3) (0.1 less than or equal to x less than or equal to 0.5), with varying magnetic ground state. The charge ...
  • Low temperature magnetic structure of MnSe 
    D'Sa, J.B.C.E.; Bhobe, P.A.; Priolkar, K.R.; Das, A.; Krishna, P.S.R.; Sarode, P.R.; Prabhu, R.B. (Pramana-Journal of Physics. 63(2); 2004; 227-232.)
    In this paper we report low temperature neutron diffraction studies on MnSe in order to understand the anomalous behaviour of their magnetic and transport properties. Our study indicates that at low temperatures MnSe has ...
  • Low-temperature neutron diffraction study of MnTe 
    D'Sa, J.B.C.E.; Bhobe, P.A.; Priolkar, K.R.; Das, A.; Paranjpe, S.K.; Prabhu, R.B.; Sarode, P.R. (Journal of Magnetism and Magnetic Materials. 285(41641); 2005; 267-271.)
    Investigation of transport and magnetic properties of MnTe at low temperatures showed anomalies like negative coefficient of resistance below 100 K and a sharp rise in susceptibility at around 83 K similar to a ferromagenetic ...
  • Modulations in magnetostructural coupling in C and Sn deficient Mn sub(3)SnC 
    Gaonkar, V.N.; Dias, E.T.; Das, A.; Nigam, A.K.; Priolkar, K.R. (Journal of Magnetism and Magnetic Materials. 488; 2019; ArticleID_165357.)
    The structural and magnetic interactions in stoichiometric (Mn sub(3)SnC), carbon deficient (Mn sub(3)SnC sub(0.8)) and tin deficient (Mn sub(3)Sn sub(0.85)C) antiperovskite compounds are studied using X-ray absorption ...
  • Neutron diffraction studies of MnSe 
    D'Sa, J.B.C.E.; Priolkar, K.R.; Das, A.; Prabhu, R.B.; Sarode, P.R.; Kamat-Dalal, V.N.; Paranjpe, S.K. (Solid State Physics India., 42. Proc. DAE solid state physics symposium. 2000; 569-570.)
  • Neutron diffraction study of MnTe 
    D'Sa, J.B.C.E.; Bhobe, P.A.; Priolkar, K.R.; Das, A.; Paranjpe, S.K; Prabhu, R.B.; Sarode, P.R. (Solid State Physics (India), Ed. by: S.L. Chaplot, P.S.R. Krishna and T. Sakuntala. Narosa Publishing House, New Delhi. 44; 2002; 435-436.)
    We report our neutron diffraction studies at low temperature on MnTe. The low temperature data indicates presence of another crystallographic phase along with the high temperature antiferromagnetic hexagonal phase. This ...
  • Phase separation and effect of strain on magnetic properties of Mn sub(3)Ga sub(1-x)Sn sub(x)C 
    Dias, E.T.; Das, A.; Hoser, A.; Emura, S.; Nigam, A.K.; Priolkar, K.R. (Journal of Applied Physics. 124(15); 2018; ArticleID_153902.)
    While the unit cell volume of compounds belonging to the Mn sub(3)Ga sub(1-x)Sn sub(x)C (0 less than or equal to x less than or equal to 1) series shows a conformity with Vegard’s law, their magnetic and magnetocaloric ...
  • Phase-separated magnetic ground state in Mn sub(3)Ga sub(0.45)Sn sub(0.55)C 
    Dias, E.T.; Priolkar, K.R.; Nigam, A.K.; Singh, R.; Das, A.; Aquilanti, G. (Physical Review B. 95(14); 2017; ArticleID 144418.)
    The existence of nonergodic ground states is considered as a precursor to a first-order long-range magnetostructural transformation. Mn sub(3)Ga sub(0.45)Sn sub(0.55)C lies compositionally between two compounds, Mn sub(3)GaC ...
  • Spin-1 bosons in optical superlattice 
    Gaonker, C.G.F.; Alavani, B.K.; Das, A.; Pai, R.V. (AIP Conference Proceedings. 2115(1); 2019; ArticleID_030016.)
    In this paper, we analyze superfluid, insulator and various magnetic phases of ultracold spin-1 bosonic atoms in two-dimensional optical superlattices. Our studies have been performed using Cluster Mean Field Theory. ...
  • Structural and magnetic phase diagram of MnSe(1-x)Te(x) 
    Priolkar, K.R.; Bhobe, P.A.; D'Sa, J.B.C.E.; Das, A.; Krishna, P.S.R.; Sarode, P.R. (Solid State Phys. DAE Symp. 50; 2005; 833-834.)
    Neutron diffraction studies as a function of temperature on solid solutions of MnSe and MitTe in the Se rich region are presented. As Te is doped in MnSe, the structural phase transition wherein some portion of the sample ...
  • Structural and magnetic phase transitions in MnTe-MnSe solid solutions 
    Ingle, K.E.; D'Sa, J.B.C.E.; Das, A.; Priolkar, K.R. (Journal of Magnetism and Magnetic Materials. 347; 2013; 68-71.)
    Neutron diffraction studies as a function of temperature on solid solutions of MnSe and MnTe in the Se rich region are presented. Interestingly as Te is doped in MnSe, the structural transformation to NiAs phase diminishes, ...
  • Structure, transport and magnetic properties in La(2x)Sr(2-2x)Co(2x)Ru(2-2x)O(6) 
    Murthy, P.S.R.; Priolkar, K.R.; Bhobe, P.A.; Das, A.; Sarode, P.R.; Nigam, A.K. (Journal of Magnetism and Magnetic Materials. 323(6); 2011; 822-828.)
    The perovskite solid solutions of the type La(2x)Sr(2-2x)Co(2x)Ru(2-2x)O(6) with 0.25 less than or equal to x less than or equal to 0.75 have been investigated for their structural, magnetic and transport properties. All ...

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