Current-induced switching of a ferromagnetic Weyl semimetal Co2MnGa
Name
212409_1_online.pdf
Description
Published version
Size
2.61 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Han, Jiahao
McGoldrick, Brooke C
Chou, Chung-Tao
Safi, Taqiyyah S
Hou, Justin T
Liu, Luqiao
Date Issued
November 24, 2021
Journal
Applied Physics Letters
Publisher
AIP Publishing
Citation
Jiahao Han, Brooke C. McGoldrick, Chung-Tao Chou, Taqiyyah S. Safi, Justin T. Hou, Luqiao Liu; Current-induced switching of a ferromagnetic Weyl semimetal Co2MnGa. Appl. Phys. Lett. 22 November 2021; 119 (21): 212409.
Abstract
The introduction of magnetic moments to topological materials provides rich opportunities for studying the interplay among magnetism, electron correlation, and topological orders, which can give rise to exotic magnetoelectric effects and allow one to manipulate the topological band structure via spintronic approaches. Here, we report current-induced switching in a thin film of ferromagnetic Weyl semimetal Co2MnGa with perpendicular magnetic anisotropy, via the spin–orbit torque from a neighboring heavy metal Pt. The reversal of the large anomalous Hall signal indicates an effective electrical control of the Berry curvatures associated with the Weyl nodes in the topological band structure. The efficiency of the spin–orbit torque switching is calibrated to be comparable to that in conventional ferromagnets. Given the compatibility of Co2MnGa films with various spintronic devices and techniques, our work represents an essential step toward memory and computing devices built by topological ferromagnetic materials.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
10.1063/5.0073537
