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Colossal Orbital Current Induced by Gradient Oxidation for High-Efficiency Magnetization Switching.
Xu, Xinkai; Zhang, Dainan; Liao, Zhimin; Yan, Peng; Wang, Yixin; Zhang, Lei; Zhong, Zhiyong; Bai, Feiming; Qu, Yuanjing; Zhang, Huaiwu; Jin, Lichuan.
Afiliação
  • Xu X; School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
  • Zhang D; State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
  • Liao Z; State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
  • Yan P; State key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, P. R. China.
  • Wang Y; State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
  • Zhang L; School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
  • Zhong Z; State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
  • Bai F; School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
  • Qu Y; State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
  • Zhang H; School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
  • Jin L; State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
Small ; : e2403881, 2024 Jul 14.
Article em En | MEDLINE | ID: mdl-39004854
ABSTRACT
Orbital angular momentum flow can be used to develop a low-dissipation electronic information device by manipulating the orbital current. However, efficiently generating and fully harnessing orbital currents is a formidable challenge. In this study, an approach is presented that induces a colossal orbital current by gradient oxidation in Pt/Ta to enhance spin-orbit torque (SOT) and achieve high-efficiency magnetization switching. The maximum efficiency of the SOT before and after the gradient oxidation of Ta is improved relative to that of Pt by ≈600 and 1200%, respectively. The large SOT originates from the colossal orbital current because of the orbital Rashba-Edelstein effect induced by the gradient oxidation of Ta. In addition, a large spin-to-charge conversion efficiency is observed in yttrium iron garnet/Pt/TaOx because of the inverse orbital Rashba-Edelstein effect. Harnessing the orbital current can help effectively minimize the critical current density of the current-induced magnetization switching to 2.26-1.08 × 106 A cm-2, marking a 12-fold reduction compared to that using Pt. This findings provide a new path for research on low-dissipation spin-orbit devices and improve the tunability of orbital current generation.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Small Assunto da revista: ENGENHARIA BIOMEDICA Ano de publicação: 2024 Tipo de documento: Article País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Small Assunto da revista: ENGENHARIA BIOMEDICA Ano de publicação: 2024 Tipo de documento: Article País de publicação: Alemanha