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 journalArticlepeer-review

    9 Citations (Scopus)


    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
    Issue number10
    Publication statusPublished - 2008 Oct


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

    ASJC Scopus subject areas

    • Physics and Astronomy(all)


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