Large Spin-Orbit Torque with Multi-Directional Spin Components in Ni4W

Large Spin-Orbit Torque with Multi-Directional Spin Components in Ni4W

© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - (2025) vom: 15. Mai, Seite e2416763
Auteur principal: Yang, Yifei (Auteur)
Autres auteurs: Lee, Seungjun, Chen, Yu-Chia, Jia, Qi, Dixit, Brahmdutta, Sousa, Duarte, Odlyzko, Michael, Garcia-Barriocanal, Javier, Yu, Guichuan, Haugstad, Greg, Fan, Yihong, Huang, Yu-Han, Lyu, Deyuan, Cresswell, Zach, Liang, Shuang, Benally, Onri Jay, Low, Tony, Wang, Jian-Ping
Format: Article en ligne
Langue:English
Publié: 2025
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article epitaxial growth field‐free switching spintronics spin‐orbit torque unconventional spin Hall effect
Description
Résumé:© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
Spin-orbit torque (SOT) offers an efficient mechanism for manipulating the magnetization of ferromagnetic materials in spintronics-based memory and logic devices. However, conventional SOT materials, such as heavy metals and topological insulators, are limited by high crystal symmetry to generating and injecting only in-plane spins into the ferromagnet. Low-symmetry materials and symmetry-breaking strategies have been employed to generate unconventional spin currents with out-of-plane spin polarization, enabling field-free deterministic switching of perpendicular magnetization. Despite this progress, the SOT efficiency of these materials has typically remained low. Here, a large SOT efficiency of 0.3 in the bulk Ni4W at room temperature is reported, as evaluated by second harmonic Hall measurements. In addition, due to the low crystal symmetry of Ni4W, unconventional SOT from the out-of-plane and Dresselhaus-like spin components are observed. Notably, a large SOT efficiency of 0.73 is observed in W/Ni4W (5 nm), potentially resulting from additional interfacial contributions or extrinsic effects. Furthermore, field-free switching of perpendicular magnetization has been achieved using the multi-directional SOT of Ni4W, highlighting its potential as a low-symmetry SOT material for energy-efficient spintronic devices
Description:Date Revised 15.05.2025
published: Print-Electronic
Citation Status Publisher
ISSN:1521-4095
DOI:10.1002/adma.202416763