Authors
Teng Xu, Zhengde Xu, Yiqing Dong, Yang Cheng, Ledong Wang, Hongmei Feng, Hao Bai, Kun Xu, Xinyu Shu, Pu Yu, Heng-An Zhou, Enlong Liu, Shikun He, Chuanying Xi, Guoqiang Yu, Xuepeng Qiu, Se Kwon Kim, Jing Zhu, Zhifeng Zhu, Wanjun Jiang
Published in
Physical review letters. Volume 135. Issue 12. Pages 126703. Sep 19, 2025.
Abstract
Current-induced spin-orbit torques (SOTs) can electrically switch magnetic films. The thickness of these films is usually limited to a few tenths of nanometers. Toward stable spintronic nanodevices, it is important to explore the upper thickness limit and to identify the associated SOT switching mechanism, if it is different from standard models. Here, we experimentally show that the SOT switching could occur in Pt(3 nm)/Fe_{0.80}Gd_{0.20}/Ta(3 nm) trilayers with a thickness of Fe_{0.80}Gd_{0.20} ferrimagnetic films up to 200 nm, all at room temperature. The contributions from the Oersted field, bulk SOTs, and thermal activation induced by Joule heating are also discussed. Through performing atomistic spin simulations, we identify the critical role of nucleation and propagation of vertical magnetic solitons along the thickness direction, which could explain such unprecedented SOT switching behaviors in extremely thick ferrimagnets. The revelation of the vertical soliton-assisted SOT switching of the extremely thick ferrimagnets can be used for miniaturizing spintronic devices.
PMID:
41046442
Bibliographic data and abstract were imported from PubMed on 06 Oct 2025.
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