Accurate analysis of harmonic Hall voltage measurement for spin-orbit torques

Seok Jin Yun; Eun Sang Park; Kyung Jin Lee; Sang Ho Lim

doi:10.1038/am.2017.200

Accurate analysis of harmonic Hall voltage measurement for spin-orbit torques

Seok Jin Yun, Eun Sang Park, Kyung Jin Lee, Sang Ho Lim

Department of Materials Science and Engineering

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

14 Citations (Scopus)

Abstract

An accurate method is developed to extract the spin-orbit (SO) effective fields by analyzing harmonic Hall voltage measurements and deriving detailed analytical equations that consider both the z component of the applied magnetic field and the second-order perpendicular magnetic anisotropy. The method is tested by analyzing the results of a macrospin simulation. The SO effective fields that are extracted from the analysis are consistent with the input SO effective fields that are used in the macrospin simulation over the entire range of the polar magnetization angle and for a wide range (0-2) of the ratio of the planar to the anomalous Hall voltage considered in this study. The accuracy of the proposed method is demonstrated via a systematic study that involves comparing its results with those of a conventional analytical method.

Original language	English
Article number	e449
Journal	NPG Asia Materials
Volume	9
Issue number	11
DOIs	https://doi.org/10.1038/am.2017.200
Publication status	Published - 2017 Nov 17

Bibliographical note

Funding Information:
This research was supported by the Creative Materials Discovery Program via the National Research Foundation of Korea (No 2015M3D1A1070465).

ASJC Scopus subject areas

Modelling and Simulation
General Materials Science
Condensed Matter Physics

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title = "Accurate analysis of harmonic Hall voltage measurement for spin-orbit torques",

abstract = "An accurate method is developed to extract the spin-orbit (SO) effective fields by analyzing harmonic Hall voltage measurements and deriving detailed analytical equations that consider both the z component of the applied magnetic field and the second-order perpendicular magnetic anisotropy. The method is tested by analyzing the results of a macrospin simulation. The SO effective fields that are extracted from the analysis are consistent with the input SO effective fields that are used in the macrospin simulation over the entire range of the polar magnetization angle and for a wide range (0-2) of the ratio of the planar to the anomalous Hall voltage considered in this study. The accuracy of the proposed method is demonstrated via a systematic study that involves comparing its results with those of a conventional analytical method.",

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AU - Yun, Seok Jin

AU - Park, Eun Sang

AU - Lee, Kyung Jin

AU - Lim, Sang Ho

N1 - Funding Information: This research was supported by the Creative Materials Discovery Program via the National Research Foundation of Korea (No 2015M3D1A1070465).

PY - 2017/11/17

Y1 - 2017/11/17

N2 - An accurate method is developed to extract the spin-orbit (SO) effective fields by analyzing harmonic Hall voltage measurements and deriving detailed analytical equations that consider both the z component of the applied magnetic field and the second-order perpendicular magnetic anisotropy. The method is tested by analyzing the results of a macrospin simulation. The SO effective fields that are extracted from the analysis are consistent with the input SO effective fields that are used in the macrospin simulation over the entire range of the polar magnetization angle and for a wide range (0-2) of the ratio of the planar to the anomalous Hall voltage considered in this study. The accuracy of the proposed method is demonstrated via a systematic study that involves comparing its results with those of a conventional analytical method.

AB - An accurate method is developed to extract the spin-orbit (SO) effective fields by analyzing harmonic Hall voltage measurements and deriving detailed analytical equations that consider both the z component of the applied magnetic field and the second-order perpendicular magnetic anisotropy. The method is tested by analyzing the results of a macrospin simulation. The SO effective fields that are extracted from the analysis are consistent with the input SO effective fields that are used in the macrospin simulation over the entire range of the polar magnetization angle and for a wide range (0-2) of the ratio of the planar to the anomalous Hall voltage considered in this study. The accuracy of the proposed method is demonstrated via a systematic study that involves comparing its results with those of a conventional analytical method.

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Accurate analysis of harmonic Hall voltage measurement for spin-orbit torques

Abstract

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ASJC Scopus subject areas

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