Pd nanoparticle embedded with only one Co atom behaves as a single-particle magnet

Yoshikazu Ito, Akira Miyazaki, Ken Ichi Fukui, Suresh Valiyaveettil, Toshihiko Yokoyama, Toshiaki Enoki

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    Single molecular magnets and single-particle magnets have been intensively investigated from the viewpoints of spintronics devices. We employ the giant magnetic moment effect on magnetic impurities embedded in Pd in designing a single-nanoparticle magnet. A transition metal magnetic impurity such as Co has a giant magnetic moment in Pd metal due to the exchange enhancement effect. As the interaction range of the effect is ca. 1 nm from the magnetic impurity center, all Pd atoms are spin-polarized in a Pd nanoparticle having a radius smaller than the range. Here, we unveil this feature experimentally and show that a Pd nanoparticle containing only one Co atom exhibits a single-domain nanomagnet behavior with a blocking temperature of 3K.

    Original languageEnglish
    Article number103701
    Journaljournal of the physical society of japan
    Volume77
    Issue number10
    DOIs
    Publication statusPublished - 2008 Oct 1

    Keywords

    • Co-Pd nanoparticle
    • Exchange enhancement
    • Giant magnetic moment
    • Single-particle magnet
    • Superparamagnetism

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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  • Cite this

    Ito, Y., Miyazaki, A., Fukui, K. I., Valiyaveettil, S., Yokoyama, T., & Enoki, T. (2008). Pd nanoparticle embedded with only one Co atom behaves as a single-particle magnet. journal of the physical society of japan, 77(10), [103701]. https://doi.org/10.1143/JPSJ.77.103701