High field magnetism of the spinel oxide CoAl 2O 4

M. Hagiwara, S. Kimura, N. Nishihagi, T. Suzuki, M. Nohara, H. Takagi, K. Kindo

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)


    We report the results of magnetization and electron spin resonance (ESR) measurements on sintered samples of the spinel oxide CoAl 2O 4 in magnetic fields up to 53 T. In CoAl 2O 4, Co 2+ (S=3/2) ions make a diamond lattice, indicating naively that no geometrical frustration takes place. This spinel oxide, however, is thought to be in the vicinity of a quantum melting point of the antiferromagnetically ordered state because of no sharp peak in the temperature dependence of specific heat. Magnetization curve at 4.2 K is almost linear in magnetic fields and a broad ESR signal was observed on a straight resonance line with g=2.26, implying an antiferromagnetic long range order or a well developed antiferromagnetic short range order with very small anisotropy.

    Original languageEnglish
    Pages (from-to)11-14
    Number of pages4
    JournalJournal of Low Temperature Physics
    Issue number1-2
    Publication statusPublished - Apr 2010


    • ESR
    • Geometrical frustration
    • High field magnetism
    • Magnetization
    • Spinel oxides

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics
    • Materials Science(all)
    • Condensed Matter Physics


    Dive into the research topics of 'High field magnetism of the spinel oxide CoAl 2O 4'. Together they form a unique fingerprint.

    Cite this