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

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    Abstract

    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.

    Original languageEnglish
    Article number094711
    JournalJournal of the Physical Society of Japan
    Volume78
    Issue number9
    DOIs
    Publication statusPublished - 2009 Sep

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    Keywords

    • Magnetic order
    • Perovskite cobalt oxide
    • Pressure effects
    • Spin-state transition
    • Thermoelectric

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Yoshida, S., Kobayashi, W., Nakanoy, T., Terasaki, I., Matsubayashi, K., Uwatoko, Y., Grigoraviciute, I., Karppinen, M., & Yamauchi, H. (2009). Chemical and physical pressure effects on the magnetic and transport properties of the A-Site ordered perovskite Sr3YCo4O 10.5. Journal of the Physical Society of Japan, 78(9), [094711]. https://doi.org/10.1143/JPSJ.78.094711