Electric field control of magnetic domain wall motion via modulation of the Dzyaloshinskii-Moriya interaction | Zendy

Tomohiro Koyama | Zendy; Y. Nakatani | Zendy; Jun’ichi Ieda | Zendy; Daichi Chiba | Zendy

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Electric field control of magnetic domain wall motion via modulation of the Dzyaloshinskii-Moriya interaction

Author(s) -

Tomohiro Koyama,

Y. Nakatani,

Jun’ichi Ieda,

Daichi Chiba

Publication year - 2018

Publication title -

science advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.928

H-Index - 146

ISSN - 2375-2548

DOI - 10.1126/sciadv.aav0265

Subject(s) - electric field , physics , modulation (music) , condensed matter physics , motion (physics) , magnetic field , domain (mathematical analysis) , domain wall (magnetism) , magnetic domain , field (mathematics) , classical mechanics , quantum mechanics , magnetization , acoustics , mathematics , mathematical analysis , pure mathematics

We show that the electric field (EF) can control the domain wall (DW) velocity in a Pt/Co/Pd asymmetric structure. With the application of a gate voltage, a substantial change in DW velocity up to 50 m/s is observed, which is much greater than that observed in previous studies. Moreover, modulation of a DW velocity exceeding 100 m/s is demonstrated in this study. An EF-induced change in the interfacial Dzyaloshinskii-Moriya interaction (DMI) up to several percent is found to be the origin of the velocity modulation. The DMI-mediated velocity change shown here is a fundamentally different mechanism from that caused by EF-induced anisotropy modulation. Our results will pave the way for the electrical manipulation of spin structures and dynamics via DMI control, which can enhance the performance of spintronic devices.

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