Magnetic entropy change in La0.75Ca0.25-xSrxMnO3 perovskites

Zaibing Guo*, W. Yang, Y. T. Shen, Y. W. Du

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    50 Scopus citations

    Abstract

    Magnetic entropy change has been studied in a series of polycrystalline samples of La0.75Ca0.25-xSrxMnO3 with fixed carrier concentration and gradual change in the average ionic radius of the La site 〈rA〉. In a fixed crystal structure with orthorhombic or rhombohedral phase, we found that the magnetic entropy change decreases with increasing 〈rA〉. This phenomenon has been attributed to the difference in the volume thermal expansion at Tc which is influenced by 〈rA〉. A smaller 〈rA〉 would be beneficial for obtaining larger magnetic entropy change.

    Original languageEnglish (US)
    Pages (from-to)89-92
    Number of pages4
    JournalSolid State Communications
    Volume105
    Issue number2
    DOIs
    StatePublished - Jan 1 1998

    Keywords

    • A. Magnetically ordered materials
    • D. Phase transitions
    • D. Thermodynamic properties

    ASJC Scopus subject areas

    • Chemistry(all)
    • Condensed Matter Physics
    • Materials Chemistry

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