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Browsing Physics by Title

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  • On the use of a silicon crystal in a cauchois-type bent crystal x-ray spectrograph 
    Deshpande, S.D.; Moghe, N.V.; Sapre, V.B.; Mande, C. (Measurement Science and Technology. 1(11); 1990; 1250-1253.)
    The authors have studied the copper K absorption discontinuity in the metal and its oxides using a Cauchois-type bent crystal x-ray spectrograph equipped with a silicon crystal, along with a conventional x-ray source. The ...
  • On the wavelength filtering aspect of periodic multilayered waveguides 
    Choudhury, P.K.; Dey, S.; Mehta, N. (Optik. 110(11); 1999; 537-541.)
    Using the scalar field approximation, an analytical treatment of the propagation of electrogenetic (EM) waves through a periodic multilayered waveguide of circular cross sectional geometry is made; the periodicity being ...
  • 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 ...
  • Optical absorption and photoluminescent studies of cerium-doped cobalt tungstate nanomaterials 
    Naik, S.J.; UmaSubramanian; Tangsali, R.B.; Salker, A.V. (Journal of Physics D-Applied Physics. 44(11); 2011; Article ID: 115404.)
    This paper deals with optical absorption and photoluminescence properties of nanorange (22-65 nm) luminescent materials Co(1-x)Ce(x)WO(4) (where x = 0.01, 0.015, 0.02, 0.025 and 0.03) sintered in air at various temperatures. ...
  • Optical properties and storage capabilities in AB2O4:Cr(A = Zn, Mg, B = Ga, Al) 
    Sharma, S.K.; Bessiere, A.; Gourier, D.; Sraiki, G.; Viana, B.; Dereo, P.J.; Rudnicka, D.; Watras, A.; Basavaraju, N.; Priolkar, K.R.; Maldiney, T.; Scherman, D.; Richard, C. (Proc. SPIE 8987. Oxide based Materials and Devices 5. 2014; 89870J-.)
    Red emitting long-lasting phosphorescence (LLP) material, are useful biomarker for small animal in vivo imaging. We report here our investigations on the optical features of chromium doped AB2O4 spinels (A=Zn, Mg and B=Ga, ...
  • Optical properties of Pr and Nd ions in a borate glass 
    Desa, J.A.E.; Vaz, W.A.; DeSouza, B.L.; ManjuSingh (Glass Technology-European Journal of Glass Science and Technology Part A. 50(4); 2009; 230-232.)
    A set of five borate glasses containing oxides of praseodymium and neodymium have been prepared with several relative molar ratios of Pr and Nd. FTIR measurements showed the presence of the B-O stretching mode in BO(4) ...
  • Optical sensors in environmental monitoring 
    Choudhury, P.K. (Current Science. 74(9); 1998; 723-725.)
  • Optically-assisted thermophoretic reversible assembly of colloidal particles and E. coli using graphene oxide microstructures 
    Joby, J.P.; Das, S.; Pinapati, P.; Rogez, B.; Baffou, G.; Tiwari, D.K.; Sudhir, C. (Scientific Reports. 12; 2022; ArticleID_3657.)
    Optically-assisted large-scale assembly of nanoparticles have been of recent interest owing to their potential in applications to assemble and manipulate colloidal particles and biological entities. In the recent years, ...
  • Optoelectronic Analysis of CdGa2X4 (X= S, Se): A Promising Material for Solar Cells 
    Kumar, P.; Sahariya, J.; Soni, A.; Bhamu, K.C. (Materials Science Forum. 900 MSF; 2017; 69-73.)
    the optoelectronic nature of the CdGa2X4 (X = S, Se) solar cell materials are examined using full potential linear augmented plane wave (FP-LAPW) method as embodied in WIEN2K code. In present computation, we have used most ...
  • Optoelectronic behavioral study of defect-chalcopyrite semiconductors XGa sub(2)Te sub(4) (X = Zn, Cd) 
    PanchamKumar; Soni, A.; Bhamu, K.C.; Sahariya, J. (Materials Research Bulletin. 86; 2017; 131-138.)
    In this work, electronic structure and optical properties investigations for defect-chalcopyrite semiconductors ZnGa sub(2)Te sub(4) and CdGa sub(2)Te sub(4) are presented using full potential linearized augmented plane ...
  • Orbital ordering in Pr(0.5)Sr(0.5)MnO(3): PrK-edge XAFS study 
    Priolkar, K.R.; Kulkarni, V.D.; Sarode, P.R.; Kumashiro, R.; Emura, S. (Physica Scripta. T115; 2005; 442-444.)
    Pr K-edge XAFS spectrum as a function of temperature in Pr(0.5)Sr(0.5)MnO(3) has been recorded on BL01B1 beam line at Spring-8, in order to study the effect of lattice distortions as the sample passes from a paramagnetic ...
  • Order and disorder around Cr sup(3+) in chromium doped persistent luminescent AB(2)O(4) spinels 
    Basavaraju, N.; Priolkar, K.R.; Bessiere, A.; Gourier, D.; Viana, B. (Physical Chemistry Chemical Physics. 2015(17); 2015; 10993-10999.)
    The X-ray absorption near edge structure (XANES) spectroscopy technique is used to better understand the charging and decharging processes of the persistent luminescence in the Cr sup(3+)doped AB(2)O(4) spinels (A = Zn, ...
  • Origin of enhanced reducibility/oxygen storage capacity of Ce(1-x)Ti(x)O(2) compared to CeO(2) or TiO(2) 
    Dutta, G.; Waghmare, U.V.; Baidya, T.; Hegde, M.S.; Priolkar, K.R.; Sarode, P.R. (Chemistry of Materials. 18(14); 2006; 3249-3256.)
    We determine chemical origins of increase in the reducibility of CeO(2) upon Ti substitution using a combination of experiments and first-principles density functional theory calculations. Ce(1-x)Ti(x)O(2) ( x = 0.0-0.4) ...
  • Origin of superconductivity suppression in (Er1-xPrx)Ba2Cu4O8 studied by X-ray absorption spectroscopy 
    Chhikara, A.; Priolkar, K.R.; Sarode, P.R.; Prabhu, R.B. (X-ray spectroscopy and allied areas, Ed. by: S.K. Joshi, B.D. Srivastava and A.P. Deshpande. Narosa Publishing House, New Delhi. 1998; 150-152.)
  • Origin of the visible light induced persistent luminescence of Cr3+ -doped zinc gallate 
    Gourier, D.; Bessiere, A.; Sharma, S.K.; Binet, L.; Viana, B.; Basavaraju, N.; Priolkar, K.R. (Journal of Physics and Chemistry of Solids. 75(7); 2014; 826-837.)
    ZnGa2O4:Cr3+ (ZGO:Cr) is a very bright persistent phosphor able to emit a near infrared light for hours following a UV (band to band excitation) or visible (Cr3 excitation) illumination. As such it serves as an outstanding ...
  • 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 ...
  • Packing fraction induced phase separation in A-site doped antiperovskites 
    Gaonkar, V.N.; Dias, E.T.; Vedpathak, M.N.; Priolkar, K.R. (Materials Today Communications. 33; 2022; ArticleID_104459.)
    Local phase separation displayed by the A site doped Mn sub(3)Sn sub(1-x)A sub(x)C antiperovskites is investigated by studying a series of compounds wherein, the doped A site atoms inflicts changes in electronic contribution ...
  • Packing fraction related distortion of Mn sub(6) C octahedra and its effect on the first order magnetic transition in Mn based antiperovskites 
    Mungale, A.; Priolkar, K.R. (Journal of Applied Physics. 126(24); 2019; ArticleID_243905.)
    In this paper, we attempt to understand the cause of magnetostructural transformation in Mn-based antiperovskites by calculating extended x-ray absorption fine structure at the K edges of constituent metal atoms in three ...
  • Persistent luminescence in ZnGa2O4:Cr: An outstanding biomarker for in-vivo imaging 
    Sharma, S.K.; Bessiere, A.; Gourier, D.; Binet, L.; Viana, B.; Basavaraju, N.; Priolkar, K.R.; Maldiney, T.; Scherman, D.; Richard, C. (Proc. SPIE 8982, Optical Components and Materials. 2014; 898215-.)
    ZnGa2O4 (ZGO) is a normal spinel. When doped with Cr3+ ions, ZGO:Cr becomes a high brightness persistent luminescence material with an emission spectrum perfectly matching the transparency window of living tissues. It ...
  • Phase diagram of a bosonic ladder with two coupled chains 
    Luthra, M.S.; Mishra, T.; Pai, R.V.; Das, B.P. (Physical Review B. 78(16); 2008; Article ID: 165104)
    We study a bosonic ladder with two coupled chains using the finite-size density-matrix renormalization group method. We show that in a commensurate bosonic ladder the critical on-site interaction (U(C)) for the superfluid ...

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