Chemical and physical pressure effects on the magnetic and transport properties of the A-Site ordered perovskite Sr3YCo4O 10.5

Shin Yoshida*, Wataru Kobayashi, Tomohito Nakanoy, Ichiro Terasaki, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Inga Grigoraviciute, Maarit Karppinen, Hisao Yamauchi

*この研究の対応する著者

    研究成果: Article査読

    25 被引用数 (Scopus)

    抄録

    We have measured and analysed the magnetization, resistivity and thermopower of polycrystalline samples of Ca-subsituted Sr3YCo 4O10.5. While the transition temperature and thermopower systematically decrease with increasing Ca content, the resistivity is nearly independent of the Ca-substitution level. We have furhter found that the substitution of Ca for Sr systematically decreases the lattice paremeters while maintaining the oxygen content unchanged, and have explained the Ca-substitution effects in terms of the spin-state transition induced by chemical pressure. We have also measured the magnetization of one of the samples under hydrostatic pressure. The result shows that the physicalpressure effect is semiquantitatively consistent with the chemical-pressure effect.

    本文言語English
    論文番号094711
    ジャーナルJournal of the Physical Society of Japan
    78
    9
    DOI
    出版ステータスPublished - 2009 9月

    ASJC Scopus subject areas

    • 物理学および天文学(全般)

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