Microscopic Examinations of Co Valences and Spin States in Electron-Doped LaCoO^sub 3

We studied the Co valences and spin states in electron-doped ... by measuring X-ray absorption spectra and electron spin resonance. The low-temperature insulating state involves the low-spin Co^sup 3+^ state (S = 0) and the high-spin Co^sup 2+^ state, where the latter is described by g = 3.8 and j^s...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2016-09, Vol.85 (9), p.1
Main Authors: Tomiyasu, Keisuke, Koyama, Syun-Ichi, Watahiki, Masanori, Sato, Mika, Nishihara, Kazuki, Takahashi, Yuki, Onodera, Mitsugi, Iwasa, Kazuaki, Nojima, Tsutomu, Nojiri, Hiroyuki, Okamoto, Jun, Huang, Di-Jing, Yamasaki, Yuuichi, Nakao, Hironori, Murakami, Youichi
Format: Article
Language:English
Subjects:
Asymmetry
Chemical bonds
Electrons
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Summary:We studied the Co valences and spin states in electron-doped ... by measuring X-ray absorption spectra and electron spin resonance. The low-temperature insulating state involves the low-spin Co^sup 3+^ state (S = 0) and the high-spin Co^sup 2+^ state, where the latter is described by g = 3.8 and j^sub eff^ = 1/2. The results, in concurrence with the electron-hole asymmetry confirmed in the electrical resistivity, coincide with the spin-blockade phenomenon in this system. Furthermore, we discuss the g factor in terms of the strong covalent-bonding nature and consider multiple origins of this phenomenon. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0031-9015
1347-4073