Unusual impurity effect on room-temperature ferromagnet Sr3YCo4O10.56

Wataru Kobayashi, S. Yoshida, I. Terasaki

    Research output: Contribution to journalReview article

    10 Citations (Scopus)

    Abstract

    We have prepared polycrystalline samples of Sr3YCo4O10.56, Sr2.4Ca0.6YCo4O10.54, and Sr3YCo3.76Mn0.24O10.59, and found that these materials show unusual impurity effects on their transport and magnetic properties. A tiny amount of impurities such as Mn or Ca suppresses room-temperature ferromagnetism of Sr3YCo4O10.56. With the suppression, their resistivities and thermopowers are also dramatically changed. We propose that the unusual impurity effects are caused by the suppression of orbital ordering.

    Original languageEnglish
    Pages (from-to)355-360
    Number of pages6
    JournalProgress in Solid State Chemistry
    Volume35
    Issue number2-4 SPEC. ISS.
    DOIs
    Publication statusPublished - 2007

    Fingerprint

    Impurities
    impurities
    room temperature
    retarding
    Ferromagnetism
    Thermoelectric power
    Transport properties
    Temperature
    ferromagnetism
    Magnetic properties
    transport properties
    magnetic properties
    orbitals
    electrical resistivity

    Keywords

    • A-site ordering
    • Cobalt oxide
    • Ferromagnetism

    ASJC Scopus subject areas

    • Materials Chemistry

    Cite this

    Unusual impurity effect on room-temperature ferromagnet Sr3YCo4O10.56 . / Kobayashi, Wataru; Yoshida, S.; Terasaki, I.

    In: Progress in Solid State Chemistry, Vol. 35, No. 2-4 SPEC. ISS., 2007, p. 355-360.

    Research output: Contribution to journalReview article

    Kobayashi, Wataru ; Yoshida, S. ; Terasaki, I. / Unusual impurity effect on room-temperature ferromagnet Sr3YCo4O10.56 In: Progress in Solid State Chemistry. 2007 ; Vol. 35, No. 2-4 SPEC. ISS. pp. 355-360.
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    abstract = "We have prepared polycrystalline samples of Sr3YCo4O10.56, Sr2.4Ca0.6YCo4O10.54, and Sr3YCo3.76Mn0.24O10.59, and found that these materials show unusual impurity effects on their transport and magnetic properties. A tiny amount of impurities such as Mn or Ca suppresses room-temperature ferromagnetism of Sr3YCo4O10.56. With the suppression, their resistivities and thermopowers are also dramatically changed. We propose that the unusual impurity effects are caused by the suppression of orbital ordering.",
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    AU - Kobayashi, Wataru

    AU - Yoshida, S.

    AU - Terasaki, I.

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    Y1 - 2007

    N2 - We have prepared polycrystalline samples of Sr3YCo4O10.56, Sr2.4Ca0.6YCo4O10.54, and Sr3YCo3.76Mn0.24O10.59, and found that these materials show unusual impurity effects on their transport and magnetic properties. A tiny amount of impurities such as Mn or Ca suppresses room-temperature ferromagnetism of Sr3YCo4O10.56. With the suppression, their resistivities and thermopowers are also dramatically changed. We propose that the unusual impurity effects are caused by the suppression of orbital ordering.

    AB - We have prepared polycrystalline samples of Sr3YCo4O10.56, Sr2.4Ca0.6YCo4O10.54, and Sr3YCo3.76Mn0.24O10.59, and found that these materials show unusual impurity effects on their transport and magnetic properties. A tiny amount of impurities such as Mn or Ca suppresses room-temperature ferromagnetism of Sr3YCo4O10.56. With the suppression, their resistivities and thermopowers are also dramatically changed. We propose that the unusual impurity effects are caused by the suppression of orbital ordering.

    KW - A-site ordering

    KW - Cobalt oxide

    KW - Ferromagnetism

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