Spin motive force induced in Fe3O4 thin films with negative spin polarization

Masaki Nagata, Takahiro Moriyama, Kenji Tanabe, Kensho Tanaka, Daichi Chiba, Jun Ichiro Ohe, Yuki Hisamatsu, Tomohiko Niizeki, Hideto Yanagihara, Eiji Kita, Teruo Ono

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)


    Spin motive force (SMF) is induced by a time and spatial derivative of magnetizations and is dependent on spin polarization. We compare the SMF in FeNi with positive spin polarization with that in a magnetite (Fe3O4) with negative spin polarization. We observe the SMF induced by a nonuniform ferromagnetic resonance in Fe3O4 and find that the SMF in Fe3O4 is opposite to that in FeNi. This result originates from the negative spin polarization of Fe3O4. Our clear observation of the SMF depending on the sign of the spin polarization agrees well with the framework of the SMF theory.

    Original languageEnglish
    Article number123001
    JournalApplied Physics Express
    Issue number12
    Publication statusPublished - 2015 Dec

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)


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