Electrical Control of Perpendicular Magnetic Anisotropy and Spin-Orbit Torque-Induced Magnetization Switching

Qikun Huang; Yanan Dong; Xiaonan Zhao; Jing Wang; Yanxue Chen; Lihui Bai; Ying Dai; Youyong Dai; Shishen Yan; Yufeng Tian

doi:10.1002/aelm.201900782

Electrical Control of Perpendicular Magnetic Anisotropy and Spin-Orbit Torque-Induced Magnetization Switching

Qikun Huang, Yanan Dong, Xiaonan Zhao, Jing Wang, Yanxue Chen, Lihui Bai, Ying Dai, Youyong Dai, Shishen Yan, Yufeng Tian^*

^*Corresponding author for this work

Shandong University

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

12 Citations (Scopus)

Abstract

Voltage-driven oxygen ion migration in ferromagnetic metal/oxide heterostructures offers a highly effective means to tailor emergent interfacial functionalities. In heterojunctions with a core structure of Pt/Co/CoO/TiO₂ (TaO_x), it is demonstrated that exchange coupling of magnetic moments across the Co/CoO interface provides an extra source to stabilize the perpendicular magnetic anisotropy (PMA). Moreover, the strength of this interfacial coupling can be reversibly controlled through voltage-driven oxygen ion migration at the Co/CoO interface, resulting in electrical-field-controllable PMA. In combination with the spin current generated from Pt, it is revealed that the spin-orbit torque (SOT) switching of the perpendicular magnetization of Co can be turned ON/OFF by electrical field. Tunable PMA and SOT switching makes heavy metal/ferromagnetic metal/antiferromagnetic oxide heterojunctions a promising candidate to future voltage-controlled, ultralow-power, and high-density spintronics devices.

Original language	English
Article number	1900782
Journal	Advanced Electronic Materials
Volume	6
Issue number	3
DOIs	https://doi.org/10.1002/aelm.201900782
Publication status	Published - 1 Mar 2020
Externally published	Yes

Keywords

exchange coupling
oxygen ion migration
perpendicular magnetic anisotropy
spin-orbit torque

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10.1002/aelm.201900782

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title = "Electrical Control of Perpendicular Magnetic Anisotropy and Spin-Orbit Torque-Induced Magnetization Switching",

abstract = "Voltage-driven oxygen ion migration in ferromagnetic metal/oxide heterostructures offers a highly effective means to tailor emergent interfacial functionalities. In heterojunctions with a core structure of Pt/Co/CoO/TiO2 (TaOx), it is demonstrated that exchange coupling of magnetic moments across the Co/CoO interface provides an extra source to stabilize the perpendicular magnetic anisotropy (PMA). Moreover, the strength of this interfacial coupling can be reversibly controlled through voltage-driven oxygen ion migration at the Co/CoO interface, resulting in electrical-field-controllable PMA. In combination with the spin current generated from Pt, it is revealed that the spin-orbit torque (SOT) switching of the perpendicular magnetization of Co can be turned ON/OFF by electrical field. Tunable PMA and SOT switching makes heavy metal/ferromagnetic metal/antiferromagnetic oxide heterojunctions a promising candidate to future voltage-controlled, ultralow-power, and high-density spintronics devices.",

keywords = "exchange coupling, oxygen ion migration, perpendicular magnetic anisotropy, spin-orbit torque",

author = "Qikun Huang and Yanan Dong and Xiaonan Zhao and Jing Wang and Yanxue Chen and Lihui Bai and Ying Dai and Youyong Dai and Shishen Yan and Yufeng Tian",

note = "Publisher Copyright: {\textcopyright} 2019 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2020",

month = mar,

day = "1",

doi = "10.1002/aelm.201900782",

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T1 - Electrical Control of Perpendicular Magnetic Anisotropy and Spin-Orbit Torque-Induced Magnetization Switching

AU - Huang, Qikun

AU - Dong, Yanan

AU - Zhao, Xiaonan

AU - Wang, Jing

AU - Chen, Yanxue

AU - Bai, Lihui

AU - Dai, Ying

AU - Dai, Youyong

AU - Yan, Shishen

AU - Tian, Yufeng

PY - 2020/3/1

Y1 - 2020/3/1

N2 - Voltage-driven oxygen ion migration in ferromagnetic metal/oxide heterostructures offers a highly effective means to tailor emergent interfacial functionalities. In heterojunctions with a core structure of Pt/Co/CoO/TiO2 (TaOx), it is demonstrated that exchange coupling of magnetic moments across the Co/CoO interface provides an extra source to stabilize the perpendicular magnetic anisotropy (PMA). Moreover, the strength of this interfacial coupling can be reversibly controlled through voltage-driven oxygen ion migration at the Co/CoO interface, resulting in electrical-field-controllable PMA. In combination with the spin current generated from Pt, it is revealed that the spin-orbit torque (SOT) switching of the perpendicular magnetization of Co can be turned ON/OFF by electrical field. Tunable PMA and SOT switching makes heavy metal/ferromagnetic metal/antiferromagnetic oxide heterojunctions a promising candidate to future voltage-controlled, ultralow-power, and high-density spintronics devices.

AB - Voltage-driven oxygen ion migration in ferromagnetic metal/oxide heterostructures offers a highly effective means to tailor emergent interfacial functionalities. In heterojunctions with a core structure of Pt/Co/CoO/TiO2 (TaOx), it is demonstrated that exchange coupling of magnetic moments across the Co/CoO interface provides an extra source to stabilize the perpendicular magnetic anisotropy (PMA). Moreover, the strength of this interfacial coupling can be reversibly controlled through voltage-driven oxygen ion migration at the Co/CoO interface, resulting in electrical-field-controllable PMA. In combination with the spin current generated from Pt, it is revealed that the spin-orbit torque (SOT) switching of the perpendicular magnetization of Co can be turned ON/OFF by electrical field. Tunable PMA and SOT switching makes heavy metal/ferromagnetic metal/antiferromagnetic oxide heterojunctions a promising candidate to future voltage-controlled, ultralow-power, and high-density spintronics devices.

KW - exchange coupling

KW - oxygen ion migration

KW - perpendicular magnetic anisotropy

KW - spin-orbit torque

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U2 - 10.1002/aelm.201900782

DO - 10.1002/aelm.201900782

M3 - Article

AN - SCOPUS:85075192496

SN - 2199-160X

VL - 6

JO - Advanced Electronic Materials

JF - Advanced Electronic Materials

IS - 3

M1 - 1900782

ER -

Electrical Control of Perpendicular Magnetic Anisotropy and Spin-Orbit Torque-Induced Magnetization Switching

Abstract

Keywords

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