Spin-singlet formation in the geometrically frustrated spinel oxide AlV2O4

51V and 27A l NMR measurements

Yasuhiro Shimizu, Moe Tanaka, Masayuki Itoh, Takuro Katsufuji

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    We report V 51 and A 27 l NMR studies of the spin-frustrated spinel oxide AlV2 O4 in a temperature range from 850 to 2 K across a structural phase transition at 700 K. Knight shifts and nuclear spin-lattice relaxation rates at the V and Al sites show that the local spin susceptibility at two V sites diminishes at low temperatures in the insulating state, giving direct evidence for the spin-singlet formation. In addition to the singlet spins, one of the two Al sites probes paramagnetic spins with the Curie-Weiss behavior and the spin-glass transition. The results demonstrate coexistence of the spin-singlet cluster and the nearly free spins, anticipated from a theoretical model and the bulk magnetic-susceptibility measurements.

    Original languageEnglish
    Article number144423
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume78
    Issue number14
    DOIs
    Publication statusPublished - 2008 Oct 28

    Fingerprint

    Oxides
    spinel
    Nuclear magnetic resonance
    nuclear magnetic resonance
    Spin glass
    Spin-lattice relaxation
    oxides
    Magnetic susceptibility
    Glass transition
    Phase transitions
    Temperature
    magnetic permeability
    spinell
    spin-lattice relaxation
    nuclear spin
    spin glass
    probes

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Spin-singlet formation in the geometrically frustrated spinel oxide AlV2O4 : 51V and 27A l NMR measurements. / Shimizu, Yasuhiro; Tanaka, Moe; Itoh, Masayuki; Katsufuji, Takuro.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 78, No. 14, 144423, 28.10.2008.

    Research output: Contribution to journalArticle

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