Interfacial control of Dzyaloshinskii-Moriya interaction in heavy metal/ferromagnetic metal thin film heterostructures

Xin Ma; Guoqiang Yu; Xiang Li; Tao Wang; Di Wu; Kevin S. Olsson; Zhaodong Chu; Kyongmo An; John Q. Xiao; Kang L. Wang; Xiaoqin Li

doi:10.1103/PhysRevB.94.180408

Interfacial control of Dzyaloshinskii-Moriya interaction in heavy metal/ferromagnetic metal thin film heterostructures

Xin Ma, Guoqiang Yu, Xiang Li, Tao Wang, Di Wu, Kevin S. Olsson, Zhaodong Chu, Kyongmo An, John Q. Xiao, Kang L. Wang, Xiaoqin Li

College of Electrical Engineering and Computer Science

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

Abstract

The interfacial Dzyaloshinskii-Moriya interaction (DMI) in ultrathin magnetic thin film heterostructures provides a new approach for controlling spin textures on mesoscopic length scales. Here we investigate the dependence of the interfacial DMI constant D on a Pt wedge insertion layer in Ta/CoFeB/Pt(wedge)/MgO thin films by observing the asymmetric spin-wave dispersion using Brillouin light scattering. Continuous tuning of D by more than a factor of 3 is realized by inserting less than one monolayer of Pt. The observations provide new insights for designing magnetic thin film heterostructures with tailored D for controlling skyrmions and magnetic domain-wall chirality and dynamics.

Original language	English
Article number	180408
Journal	Physical Review B
Volume	94
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.94.180408
Publication status	Published - 2016 Nov 28

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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@article{49b73c3b2a1e477eb4251b786f58afb0,

title = "Interfacial control of Dzyaloshinskii-Moriya interaction in heavy metal/ferromagnetic metal thin film heterostructures",

abstract = "The interfacial Dzyaloshinskii-Moriya interaction (DMI) in ultrathin magnetic thin film heterostructures provides a new approach for controlling spin textures on mesoscopic length scales. Here we investigate the dependence of the interfacial DMI constant D on a Pt wedge insertion layer in Ta/CoFeB/Pt(wedge)/MgO thin films by observing the asymmetric spin-wave dispersion using Brillouin light scattering. Continuous tuning of D by more than a factor of 3 is realized by inserting less than one monolayer of Pt. The observations provide new insights for designing magnetic thin film heterostructures with tailored D for controlling skyrmions and magnetic domain-wall chirality and dynamics.",

author = "Xin Ma and Guoqiang Yu and Xiang Li and Tao Wang and Di Wu and Olsson, {Kevin S.} and Zhaodong Chu and Kyongmo An and Xiao, {John Q.} and Wang, {Kang L.} and Xiaoqin Li",

note = "Funding Information: The work at UT-Austin and UCLA was supported by SHINES, an Energy Frontier Research Center funded by the U.S. Department of Energy (DoE), Office of Science, Basic Energy Science (BES) under Award No. DE-SC0012670. The work at the University of Delaware was supported by NSF DMR Grant No. 1505192.",

year = "2016",

month = nov,

day = "28",

doi = "10.1103/PhysRevB.94.180408",

language = "English",

volume = "94",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "18",

}

Interfacial control of Dzyaloshinskii-Moriya interaction in heavy metal/ferromagnetic metal thin film heterostructures. / Ma, Xin; Yu, Guoqiang; Li, Xiang; Wang, Tao; Wu, Di; Olsson, Kevin S.; Chu, Zhaodong; An, Kyongmo; Xiao, John Q.; Wang, Kang L.; Li, Xiaoqin.

In: Physical Review B, Vol. 94, No. 18, 180408, 28.11.2016.

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

TY - JOUR

T1 - Interfacial control of Dzyaloshinskii-Moriya interaction in heavy metal/ferromagnetic metal thin film heterostructures

AU - Ma, Xin

AU - Yu, Guoqiang

AU - Li, Xiang

AU - Wang, Tao

AU - Wu, Di

AU - Olsson, Kevin S.

AU - Chu, Zhaodong

AU - An, Kyongmo

AU - Xiao, John Q.

AU - Wang, Kang L.

AU - Li, Xiaoqin

N1 - Funding Information: The work at UT-Austin and UCLA was supported by SHINES, an Energy Frontier Research Center funded by the U.S. Department of Energy (DoE), Office of Science, Basic Energy Science (BES) under Award No. DE-SC0012670. The work at the University of Delaware was supported by NSF DMR Grant No. 1505192.

PY - 2016/11/28

Y1 - 2016/11/28

N2 - The interfacial Dzyaloshinskii-Moriya interaction (DMI) in ultrathin magnetic thin film heterostructures provides a new approach for controlling spin textures on mesoscopic length scales. Here we investigate the dependence of the interfacial DMI constant D on a Pt wedge insertion layer in Ta/CoFeB/Pt(wedge)/MgO thin films by observing the asymmetric spin-wave dispersion using Brillouin light scattering. Continuous tuning of D by more than a factor of 3 is realized by inserting less than one monolayer of Pt. The observations provide new insights for designing magnetic thin film heterostructures with tailored D for controlling skyrmions and magnetic domain-wall chirality and dynamics.

AB - The interfacial Dzyaloshinskii-Moriya interaction (DMI) in ultrathin magnetic thin film heterostructures provides a new approach for controlling spin textures on mesoscopic length scales. Here we investigate the dependence of the interfacial DMI constant D on a Pt wedge insertion layer in Ta/CoFeB/Pt(wedge)/MgO thin films by observing the asymmetric spin-wave dispersion using Brillouin light scattering. Continuous tuning of D by more than a factor of 3 is realized by inserting less than one monolayer of Pt. The observations provide new insights for designing magnetic thin film heterostructures with tailored D for controlling skyrmions and magnetic domain-wall chirality and dynamics.

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