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

^*Corresponding author for this work

Electrical and Computer Engineering

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

90 Scopus citations

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 (US)
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
State	Published - Mar 25 2014

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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@article{56b4649479724c5fac6af1698b2f7fe3,

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.}",

year = "2014",

month = mar,

day = "25",

doi = "10.1103/PhysRevB.89.104421",

language = "English (US)",

volume = "89",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "10",

}

Magnetization switching through spin-Hall-effect-induced chiral domain wall propagation. / Yu, Guoqiang; Upadhyaya, Pramey; Wong, Kin L.; Jiang, Wanjun; Alzate, Juan G.; Tang, Jianshi; Amiri, Pedram Khalili; Wang, Kang L.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 89, No. 10, 104421, 25.03.2014.

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

TY - JOUR

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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