Interfacial Dzyaloshinskii-Moriya interaction and dampinglike spin-orbit torque in [Co/Gd/Pt] N magnetic multilayers

Title
Interfacial Dzyaloshinskii-Moriya interaction and dampinglike spin-orbit torque in [Co/Gd/Pt] N magnetic multilayers
Authors
민병철김덕호Tomoe Nishimura김대연남윤석박용근김남희Yoichi Shiota유천열최석봉Teruo Ono
Issue Date
2021-03
Publisher
Physical review B, Condensed matter and materials physics
Citation
VOL 103, NO 10, 104409
Abstract
Recently, magnetic multilayer systems have received again a great attention owing to their suitability for the generation of magnetic chiral spin structure. In this study, we experimentally investigated the interfacial Dzyaloshisnkii-Moriaya interaction (DMI) and the spin-Hall angle (SHA) of magnetic Co/Gd/Pt multilayers with respect to the repetition number N of the multilayers. The DMI and SHA are important variables that govern the stability and mobility of a homochiral spin structure, respectively. The experimental results show that the ratio between the DMI and the dipole energy from the domain wall gradually decreases as N increases, which is expected to be hard to achieve homochiral spin structure for larger N and the values of SHA remain constant irrespective of N. The observed SHA invariance indicates that the Pt layers in repetition have a negligible effect on the SHA.
URI
http://pubs.kist.re.kr/handle/201004/72961
ISSN
2469-9950
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KIST Publication > Article
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