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Simultaneous determination of effective spin-orbit torque fields in magnetic structures with in-plane anisotropy

Luo, Feilong; Goolaup, Sarjoosing; Law, Wai Cheung; Li, Sihua; Tan, Funan; Engel, Christian; Zhou, Tiejun and Lew, Wen Siang (2017). Simultaneous determination of effective spin-orbit torque fields in magnetic structures with in-plane anisotropy. Physical Review B, 95, article no. 174415.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1103/PhysRevB.95.174415
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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.

Item Type: Journal Item
Copyright Holders: 2017 American Physical Society
ISSN: 1098-0121
Project Funding Details:
Funded Project NameProject IDFunding Body
Competitive Research Programme (Non-volatile Magnetic Logic and Memory Integrated Circuit Devices)NRF-CRP9-2011- 01Singapore National Research Foundation, Prime Minister’s Office
Industry-IHL Partnership ProgramNRF2015- IIP001-001Not Set
MOE-AcRF Tier 2 GrantMOE 2013-T2-2-017Not Set
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 59847
Depositing User: Vikram Goolaup
Date Deposited: 26 Mar 2019 16:27
Last Modified: 07 Jun 2019 02:13
URI: http://oro.open.ac.uk/id/eprint/59847
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