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Title: Simultaneous determination of effective spin-orbit torque fields in magnetic structures with in-plane anisotropy
Authors: Luo, Feilong
Goolaup, Sarjoosing
Law, Wai Cheung
Li, Sihua
Tan, Funan
Engel, Christian
Zhou, Tiejun
Lew, Wen Siang
Keywords: Spin Torque
Issue Date: 2017
Source: Luo, F., Goolaup, S., Law, W. C., Li, S., Tan, F., Engel, C., . . . Lew, W. S. (2017). Simultaneous determination of effective spin-orbit torque fields in magnetic structures with in-plane anisotropy. Physical Review B, 95(17), 174415-. doi:10.1103/PhysRevB.95.174415
Series/Report no.: Physical Review B
Abstract: The strength of spin-orbit torque in ferromagnetic structures is characterized by fieldlike and dampinglike effective fields. Conventionally, two distinct measurement approaches are employed to quantify the magnitude of the respective effective fields in structures with in-plane magnetic anisotropy. Here, we propose and demonstrate a self-validating method, which enables simultaneous quantification of both the fieldlike and dampinglike terms in structures with in-plane magnetic anisotropy. An analytical expression is derived and validated by harmonic Hall resistance measurement. Both the fieldlike and dampinglike effective fields are extracted from a single measurement using the derived fitting functions for the second harmonic Hall resistance. The first harmonic Hall resistance acts as a reference to confirm that the experimental parameters are consistent with the derived equations.
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.95.174415
Rights: © 2017 American Physical Society (APS). This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society (APS). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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