http://nopr.niscair.res.in/handle/123456789/9017 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/9636 Title: <link rel="File-List" href="file:///C:%5CDOCUME%7E1%5Ccharu%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml"> Self-injection length of polarized spins in La_0.7Ca_0.3MnO₃ -YBa₂Cu₃O_7-_d ferromagnet-superconductor heterostructures <br/> <br/>Authors: Banerjee, T; Wanchoo, S K; Pai, S P; Spallart, M Neumann; Narsale, A M; Pinto, R <br/> <br/>Abstract: <link rel="File-List" href="file:///C:%5CDOCUME%7E1%5Ccharu%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml"> Studies on the self-injection length of polarized spins in La_0.7Ca_0.3MnO₃ (LCMO)-YBa₂Cu₃O_7-_d (YBCO) heterostructures on LaAlO₃ (LAO) substrates fabricated <i style="">in situ</i> with pulsed laser deposition have been carried out. The measured critical current density, <i>J_c</i> of YBCO microbridges on LAO (control) arm was found to be larger than that of the microbridges on the LCMO arm. The difference in <i>J_c</i> in the two arms indicates that a certain thickness of YBCO has become effectively normal due to self-injection of spin-polarized carriers. Further, by measuring transition temperature <i>T_c</i> of YBCO layers with ac susceptibility, it has been found that the thickness of the non-superconducting YBCO layer, due to self-injection at the interface, depends upon the LCMO thickness. Both the above experiments led us to estimate the maximum thickness of the non-superconducting YBCO layer at the interface due to self-injection of spin polarized quasi-particles from YBCO into LCMO; this thickness is found to be in the range 650-850 Å for LCMO thickness ≥ 1000 Å. A control experiment performed on YBCO-LNO (LaNiO₃) heterostructure did not show any evidence of self-injection. <br/> <br/>Page(s): 764-770 http://nopr.niscair.res.in/handle/123456789/9635 Title: Absorption and infrared spectra of gamma irradiated ternary silicate glasses containing cobalt <br/> <br/>Authors: Batal, Fatma H A El; Nada, N; Desouky, S M; Khalil, Magda M I <br/> <br/>Abstract: <link rel="File-List" href="file:///C:%5CDOCUME%7E1%5Ccharu%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml"> Optical and infrared absorption spectra of undoped ternary silicate and CoO doped glasses were measured before and after successive gamma ray irradiation. The results obtained revealed the existence of cobalt ions mainly in tetrahedral coordination in such host glasses. The radiation-induced defects created by gamma irradiation are related to intrinsic effect of the glass constituents and extrinsic effect due to the cobalt ions. The response of the glass to irradiation and the growth rate of colour center formation are related to the equilibrium between the formation and annihilation processes of induced colour centers and the saturation or equilibrium state reached by successive irradiation. <br/> <br/>Page(s): 711-721 http://nopr.niscair.res.in/handle/123456789/9634 Title: Ultrasonic studies of aqueous solutions of poly diallyl dimethyl ammonium chloride <br/> <br/>Authors: Seetharaman, V; Kalyanasundaram, S; Gopalan, A <br/> <br/>Abstract: <link rel="File-List" href="file:///C:%5CDOCUME%7E1%5Ccharu%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml"> Poly diallyl dimethyl ammonium chloride (DADMAC) was synthesized by solution polymerization technique using potassium peroxomono sulphate. The ultrasonic velocity and density for solutions of the synthesized poly(DADMAC) in the different concentration ranges are measured at three different temperatures 308, 313 and 318K. Parameters like apparent molal compressibility, apparent molal volume and molar solvated volume in terms of molar hydration number are computed on the basis of Padova model. The variation of apparent molal compressibility and molar solvation number indicates interaction between the polymer and the solvent. <br/> <br/>Page(s): 735-740 http://nopr.niscair.res.in/handle/123456789/9633 Title: Theoretical ultrasonic velocities in binary liquid mixtures using scaled particle theory <br/> <br/>Authors: Ghosh, Sharada; Pande, K N; Wankhade, Y D <br/> <br/>Abstract: <link rel="File-List" href="file:///C:%5CDOCUME%7E1%5Ccharu%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml"> Ultrasonic velocity and density have been measured in binary liquid mixtures of 1,1,1-trichloroethane with 1-alkanols at 303K. Shapes of constituent molecules are considered as spherical, cubical and tetrahedral with the application of scaled particle theory. Theoretical velocities have been compared with observed velocities for each shape combination. An attempt has been made to predict the behavioural shape of 1,1,1-trichloroethane, 1-propanol, 1-butanol, 1-pentanol and 1-hexanol <br/> <br/>Page(s): 729-734