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    題名: X-ray absorption spectroscopy study of the La0.7Ba0.3Mn1−xCoxO3 system
    作者: 張經霖;Chang, C. L.;Tai, M. F.;Chung, T. W.;Lee, F. Y.;Su, Y. W.;Liu, S. Y.;Hwang, C. S.;鄭伯昆;Tseng, P. K.;Shi, J. B.
    貢獻者: 淡江大學物理學系
    關鍵詞: X-ray absorption;Electronic structure
    日期: 2000-02
    上傳時間: 2009-12-31 10:27:47 (UTC+8)
    出版者: Elsevier
    摘要: We report the transition-metal (Mn and Co) K-edge X-ray absorption spectroscopy (XAS) study of a series of La0.7Ba0.3Mn1−xCoxO3 (0⩽x⩽1) samples. Systematic chemical shifts to higher energy with the Co content (x) are observed in both Mn and Co K-edge spectra. The chemical shift to higher energy in Mn K-edge spectra is caused by the decreased Mn3+/Mn4+ ratio due to Co substitution of Mn. The Co K-edge spectra show that the Co valence is between 2+ and 3+, which also increases with x. The effect of electronic structures on the physical properties are briefly discussed.
    關聯: Journal of Magnetism and Magnetic Materials 209(1-3), pp.240-242
    DOI: 10.1016/S0304-8853(99)00701-5
    顯示於類別:[物理學系暨研究所] 期刊論文


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