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

doi:10.1103/physrevb.94.180408

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

Journal Article · Mon Nov 28 00:00:00 EST 2016 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.94.180408· OSTI ID:1388922

Ma, Xin ^[1]; Yu, Guoqiang ^[2]; Li, Xiang ^[2]; Wang, Tao ^[3]; Wu, Di ^[2]; Olsson, Kevin S. ^[1]; Chu, Zhaodong ^[1]; An, Kyongmo ^[1]; Xiao, John Q. ^[3]; Wang, Kang L. ^[2]; Li, Xiaoqin ^[1]

Univ. of Texas, Austin, TX (United States)
Univ. of California, Los Angeles, CA (United States)
Univ. of Delaware, Newark, DE (United States)

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 in this work provide new insights for designing magnetic thin film heterostructures with tailored D for controlling skyrmions and magnetic domain-wall chirality and dynamics.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012670

OSTI ID:: 1388922

Alternate ID(s):: OSTI ID: 1333590

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 18 Vol. 94; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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