Magnetization switching through spin-Hall-effect-induced chiral domain wall propagation

Guoqiang Yu; Pramey Upadhyaya; Kin L. Wong; Wanjun Jiang; Juan G. Alzate; Jianshi Tang; Pedram Khalili Amiri; Kang L. Wang

doi:10.1103/PhysRevB.89.104421

Magnetization switching through spin-Hall-effect-induced chiral domain wall propagation

Guoqiang Yu, Pramey Upadhyaya, Kin L. Wong, Wanjun Jiang, Juan G. Alzate, Jianshi Tang, Pedram Khalili Amiri, Kang L. Wang

College of Electrical Engineering and Computer Science

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

105 Citations (Scopus)

Abstract

The influence of spin-Hall-effect spin torque (SHE-ST) induced by in-plane charge current was studied in microscale Ta/Co20Fe60B20/TaOx films with perpendicular magnetization. Simultaneous electrical transport and polar magneto-optical Kerr effect (MOKE) imaging experiments were used to investigate the switching dynamics. A rich set of switching behaviors was observed, which can be well understood by analyzing a switching-phase diagram and polar MOKE images, considering the competition between SHE-ST and the externally applied magnetic field. Furthermore, we found that domain walls with a particular chirality were dominant in our devices, which suggests the presence of the Dzyaloshinskii-Moriya interaction in the present material system.

Original language	English
Article number	104421
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	89
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.89.104421
Publication status	Published - 2014 Mar 25

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.89.104421

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title = "Magnetization switching through spin-Hall-effect-induced chiral domain wall propagation",

abstract = "The influence of spin-Hall-effect spin torque (SHE-ST) induced by in-plane charge current was studied in microscale Ta/Co20Fe60B20/TaOx films with perpendicular magnetization. Simultaneous electrical transport and polar magneto-optical Kerr effect (MOKE) imaging experiments were used to investigate the switching dynamics. A rich set of switching behaviors was observed, which can be well understood by analyzing a switching-phase diagram and polar MOKE images, considering the competition between SHE-ST and the externally applied magnetic field. Furthermore, we found that domain walls with a particular chirality were dominant in our devices, which suggests the presence of the Dzyaloshinskii-Moriya interaction in the present material system.",

author = "Guoqiang Yu and Pramey Upadhyaya and Wong, {Kin L.} and Wanjun Jiang and Alzate, {Juan G.} and Jianshi Tang and Amiri, {Pedram Khalili} and Wang, {Kang L.}",

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doi = "10.1103/PhysRevB.89.104421",

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T1 - Magnetization switching through spin-Hall-effect-induced chiral domain wall propagation

AU - Yu, Guoqiang

AU - Upadhyaya, Pramey

AU - Wong, Kin L.

AU - Jiang, Wanjun

AU - Alzate, Juan G.

AU - Tang, Jianshi

AU - Amiri, Pedram Khalili

AU - Wang, Kang L.

PY - 2014/3/25

Y1 - 2014/3/25

N2 - The influence of spin-Hall-effect spin torque (SHE-ST) induced by in-plane charge current was studied in microscale Ta/Co20Fe60B20/TaOx films with perpendicular magnetization. Simultaneous electrical transport and polar magneto-optical Kerr effect (MOKE) imaging experiments were used to investigate the switching dynamics. A rich set of switching behaviors was observed, which can be well understood by analyzing a switching-phase diagram and polar MOKE images, considering the competition between SHE-ST and the externally applied magnetic field. Furthermore, we found that domain walls with a particular chirality were dominant in our devices, which suggests the presence of the Dzyaloshinskii-Moriya interaction in the present material system.

AB - The influence of spin-Hall-effect spin torque (SHE-ST) induced by in-plane charge current was studied in microscale Ta/Co20Fe60B20/TaOx films with perpendicular magnetization. Simultaneous electrical transport and polar magneto-optical Kerr effect (MOKE) imaging experiments were used to investigate the switching dynamics. A rich set of switching behaviors was observed, which can be well understood by analyzing a switching-phase diagram and polar MOKE images, considering the competition between SHE-ST and the externally applied magnetic field. Furthermore, we found that domain walls with a particular chirality were dominant in our devices, which suggests the presence of the Dzyaloshinskii-Moriya interaction in the present material system.

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Magnetization switching through spin-Hall-effect-induced chiral domain wall propagation

Abstract

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