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    題名: Anomalous Pr ordering and structural analysis for oxygenated tetragonal 1212 compound Pr1.5Ba1.5Cu3O7.2
    作者: Ku, H. C.;Luo, H. M.;Chi, Y. P.;Lin, B. N.;Hsu, Y. Y.;Lee, T. J.;Shi, J. B.;高惠春;Kao, H. C. I.
    貢獻者: 淡江大學化學學系
    日期: 1999-11-01
    上傳時間: 2009-12-01 09:00:18 (UTC+8)
    出版者: Springer
    摘要: Magnetic measurement and powder X-ray Rietveld analysis are performed on oxygenated Pr1.5Ba1.5Cu3O7.2cuprate. This tetragonal compound with lattice parameters a = 0.38916 nm and c = 1.16177 nm is found to form the TlBa2CaCu2O71212-type structure when written as Cu[Ba1.5Pr0.5]PrCu2O7.2. Low temperature magnetic data indicate that anomalous Pr order temperature TN(Pr) decreases from 18 K for orthorhombic PrBa2Cu3O6.9to 10.5 K for Pr1.5Ba1.5Cu3O7.2. The increasing Pr-O bond length with decreasing TNindicates that Pr ordering is closely correlated with the wave function overlap between Pr-4f orbital and O-2pπorbital in the CuO2bi-layers.
    關聯: Journal of low temperature physics 117(3-4), pp.885-890
    DOI: 10.1023/A:1022546723142
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

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