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

doi:10.7567/APEX.8.123001

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 journal › Article › peer-review

8 Citations (Scopus)

Abstract

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 language	English
Article number	123001
Journal	Applied Physics Express
Volume	8
Issue number	12
DOIs	https://doi.org/10.7567/APEX.8.123001
Publication status	Published - 2015 Dec

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "Spin motive force induced in Fe3O4 thin films with negative spin polarization",

abstract = "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.",

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

note = "Publisher Copyright: {\textcopyright} 2015 The Japan Society of Applied Physics.",

year = "2015",

month = dec,

doi = "10.7567/APEX.8.123001",

language = "English",

volume = "8",

journal = "Applied Physics Express",

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TY - JOUR

T1 - Spin motive force induced in Fe3O4 thin films with negative spin polarization

AU - Nagata, Masaki

AU - Moriyama, Takahiro

AU - Tanabe, Kenji

AU - Tanaka, Kensho

AU - Chiba, Daichi

AU - Ohe, Jun Ichiro

AU - Hisamatsu, Yuki

AU - Niizeki, Tomohiko

AU - Yanagihara, Hideto

AU - Kita, Eiji

AU - Ono, Teruo

PY - 2015/12

Y1 - 2015/12

N2 - 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.

AB - 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.

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

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