Spin Hall torque magnetometry of Dzyaloshinskii domain walls

Satoru Emori; Eduardo Martinez; Kyung Jin Lee; Hyun Woo Lee; Uwe Bauer; Sung Min Ahn; Parnika Agrawal; David C. Bono; Geoffrey S.D. Beach

doi:10.1103/PhysRevB.90.184427

Spin Hall torque magnetometry of Dzyaloshinskii domain walls

Satoru Emori, Eduardo Martinez, Kyung Jin Lee, Hyun Woo Lee, Uwe Bauer, Sung Min Ahn, Parnika Agrawal, David C. Bono, Geoffrey S.D. Beach

Research output: Contribution to journal › Article › peer-review

224 Citations (Scopus)

Abstract

Current-induced domain wall motion in the presence of the Dzyaloshinskii-Moriya interaction (DMI) is experimentally and theoretically investigated in heavy-metal/ferromagnet bilayers. The angular dependence of the current-induced torque and the magnetization structure of Dzyaloshinskii domain walls are described and quantified simultaneously in the presence of in-plane fields. We show that the DMI strength depends strongly on the heavy metal, varying by a factor of 20 between Ta and Pa, and that strong DMI leads to wall distortions not seen in conventional materials. These findings provide essential insights for understanding and exploiting chiral magnetism for emerging spintronics applications.

Original language	English
Article number	184427
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.90.184427
Publication status	Published - 2014 Nov 25

Bibliographical note

Publisher Copyright:
© 2014 American Physical Society.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.90.184427

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title = "Spin Hall torque magnetometry of Dzyaloshinskii domain walls",

abstract = "Current-induced domain wall motion in the presence of the Dzyaloshinskii-Moriya interaction (DMI) is experimentally and theoretically investigated in heavy-metal/ferromagnet bilayers. The angular dependence of the current-induced torque and the magnetization structure of Dzyaloshinskii domain walls are described and quantified simultaneously in the presence of in-plane fields. We show that the DMI strength depends strongly on the heavy metal, varying by a factor of 20 between Ta and Pa, and that strong DMI leads to wall distortions not seen in conventional materials. These findings provide essential insights for understanding and exploiting chiral magnetism for emerging spintronics applications.",

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AU - Emori, Satoru

AU - Martinez, Eduardo

AU - Lee, Kyung Jin

AU - Lee, Hyun Woo

AU - Bauer, Uwe

AU - Ahn, Sung Min

AU - Agrawal, Parnika

AU - Bono, David C.

AU - Beach, Geoffrey S.D.

PY - 2014/11/25

Y1 - 2014/11/25

N2 - Current-induced domain wall motion in the presence of the Dzyaloshinskii-Moriya interaction (DMI) is experimentally and theoretically investigated in heavy-metal/ferromagnet bilayers. The angular dependence of the current-induced torque and the magnetization structure of Dzyaloshinskii domain walls are described and quantified simultaneously in the presence of in-plane fields. We show that the DMI strength depends strongly on the heavy metal, varying by a factor of 20 between Ta and Pa, and that strong DMI leads to wall distortions not seen in conventional materials. These findings provide essential insights for understanding and exploiting chiral magnetism for emerging spintronics applications.

AB - Current-induced domain wall motion in the presence of the Dzyaloshinskii-Moriya interaction (DMI) is experimentally and theoretically investigated in heavy-metal/ferromagnet bilayers. The angular dependence of the current-induced torque and the magnetization structure of Dzyaloshinskii domain walls are described and quantified simultaneously in the presence of in-plane fields. We show that the DMI strength depends strongly on the heavy metal, varying by a factor of 20 between Ta and Pa, and that strong DMI leads to wall distortions not seen in conventional materials. These findings provide essential insights for understanding and exploiting chiral magnetism for emerging spintronics applications.

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DO - 10.1103/PhysRevB.90.184427

M3 - Article

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JO - Physical Review B - Condensed Matter and Materials Physics

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Spin Hall torque magnetometry of Dzyaloshinskii domain walls

Abstract

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ASJC Scopus subject areas

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