Physics: Recent submissions

  • 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 ...
  • Oxide-ion conductivity in Cu(x)Ce(1-x)O(2-delta) (0 less than or equal to x less than or equal to 0.10) 
    Gayen, A.; Priolkar, K.R.; Shukla, A.K.; Ravishankar, N.; Hegde, M.S. (Materials Research Bulletin. 40(3); 2005; 421-431.)
    Up to 10 at. percent of copper readily substitutes for cerium in ceria. It is found that at oxygen partial pressures between 0.21 atm and 10(-5) atm, Cu(x)Ce(1-x)O(2-delta) (0 less than = x less than = 0.10) solid solution ...
  • Effect of sintering temperature and environment on magnetic properties of nanoparticle Mn-Zn ferrite synthesized with nitrilotriacetate precursor method 
    Tangsali, R.B.; Keluskar, S.H.; Naik, G.K.; Budkuley, J.S. (International Journal of Nanoscience. 3; 2004; 589-597.)
    Nitrilotriacetate precursors have been used for synthesis of oxide materials. High permeability Mn–Zn ferrite with general formula Mn sub(x)Zn sub(1-x)Fe sub(2)O sub(4) where x=0.3/0.35/0.4/0.45/0.5/0.55/0.6/0.65/0.7 were ...
  • Ce(1-x)Rh(x)O(2-delta) solid solution formation in combustion-synthesized Rh/CeO2 catalyst studied by XRD, TEM, XPS, and EXAFS 
    Gayen, A.; Priolkar, K.R.; Sarode, P.R.; Jayaram, V.; Hegde, M.S.; Subbanna, G.N.; Emura, S. (Chemistry of Materials. 16(11); 2004; 2317-2328.)
    Ionically dispersed Rh over CeO2 in Rh/CeO2 catalysts prepared by a single step solution combustion method is shown to improve the redox property and catalytic activity. The H-2/ Rh ratio obtained from hydrogen uptake ...
  • 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 ...
  • Resistivity and thermopower of Ni(2.19)Mn(0.81)Ga 
    Priolkar, K.R.; Bhobe, P.A.; Sapeco, S.D.; Paudel, R. (Physical Review B. 70(13); 2004; Article ID: 132408.)
    We report results of the first studies on the thermoelectric power (TEP) of the magnetic heusler alloy Ni(2.19)Mn(0.81)Ga. We explain the observed temperature dependence of the TEP in terms of the crystal field splitting ...
  • Carbon-supported Pt-Fe alloy as a methanol-resistant oxygen-reduction catalyst for direct methanol fuel cells 
    Shukla, A.K.; Raman, R.K.; Choudhury, N.A.; Priolkar, K.R.; Sarode, P.R.; Emura, S.; Kumashiro, R. (Journal of Electroanalytical Chemistry. 563(2); 2004; 181-190.)
    Crossover of methanol from the anode to the cathode through the polymer-electrolyte membrane in solid-polymer-electrolyte direct methanol fuel cells constitutes a significant loss in their performance. Pt/C and Pt-Fe/C ...
  • Intermartensitic Transitions in Ni-Mn-Ga 
    Bhobe, P.A.; Priolkar, K.R.; Sarode, P.R. (Solid State Phys. DAE Symp. 50; 2005; 87-88.)
    Different phases like five- and seven-layered modulations (referred to as 5M and 7M) and the non-modulated (NM) are observed during the martensite phase formation in the Ni-Mn-Ga system A hysteresis in transport properties ...
  • Ionic Dispersion of Pt over CeO(2) by Combustion Method: Structural Investigation by XRD, TEM, XPS and EXAFS 
    Bera, P.; Priolkar, K.R.; Gayen, A.; Sarode, P.R.; Hegde, M.S.; Emura, S.; Kumashiro, R.; Jayaram, V.; Subbanna, G.N. (Chemistry of Materials. 15(Apr); 2003; 2049-2060.)
    The structure and chemical nature of Pt in combustion-synthesized Pt/CeO(2) catalysts have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ...
  • The one-dimensional extended Bose-Hubbard model 
    Pai, R.V.; Pandit, Rahul (Proceedings of the Indian Academy of Sciences-Chemical Sciences. 115(5and6); 2003; 721-726.)
    We use the finite-size, density-matrix-renormalization-group (DMRG) method to obtain the zero-temperature phase diagram of the one-dimensional, extended Bose-Hubbard model, for mean boson density rho = 1, in the U-V plane ...

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