Hole-Doping Effect on the Spin State and Microscopic Magnetic Properties of La_<1-x>Sr_xCoO_3 (0 ≤X≤0.5) : ^<59>Co and ^<139>La NMR Measurements
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概要
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^<59>Co and ^<139>La NMR measurements have been made to reveal microscopically the hole-doping effect on the spin state and magnetic properties of La_<1-x>Sr_xCoO_3 (0≤X≤0.5). The signal from the Co atoms with no Sr nearest neighbors was observed in the spin-glass region below x_c 〜 0.18. From the analysis of the temperature dependence of the Knight shift, the ground state of such Co atoms was found to be the trivalent low-spin state ^1A_<1g>. Above X_c, we observed at 4.2 K the ^<59>Co and ^<139>La signals which come from the cluster-glass region with a finite ferromagnetic correlation. Thus, it was microscopically confirmed that the boundary between the two regions is located at X_c 〜 0.18.
- 社団法人日本物理学会の論文
- 1995-03-15
著者
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Itoh Masayuki
Department Of Mental Retardation And Birth Defect Research National Center Of Neurology And Psychiat
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Natori Ikuomi
Department of Physics, Faculty of Science, Chiba University
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Itoh Masayuki
Department Of Applied Chemistry Kanagawa Institute Of Technology
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Natori Ikuomi
Department Of Physics Faculty Of Science Chiba University
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ITOH Masayuki
Department of Physics, Faculty of Science, Chiba University
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