Dual Control of Giant Field-like Spin Torque in Spin Filter Tunnel Junctions

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題名:	Dual Control of Giant Field-like Spin Torque in Spin Filter Tunnel Junctions
作者:	唐毓慧;Tang, Y. -H.;Chu, F. -C.;Kioussis, Nicholas
貢獻者:	理學院物理學系
關鍵詞:	639/766/119/1001;639/925/927/1062;Humanities and Social Sciences;Magnetic fields;multidisciplinary;Science;Splitting
日期:	2015-06-22
上傳時間:	2026-04-23 11:51:56 (UTC+8)
出版者:	Nature Publishing Group;London: Nature Publishing Group UK
摘要:	摘要： We predict a giant field-like spin torque, , in spin-filter (SF) barrier tunnel junctions in sharp contrast to existing junctions based on nonmagnetic passive barriers. We demonstrate that has linear bias behavior, is independent of the SF thickness and has odd parity with respect to the SF’s exchange splitting. Thus, it can be selectively controlled via external bias or external magnetic field which gives rise to sign reversal of via magnetic field switching. The underlying mechanism is the interlayer exchange coupling between the noncollinear magnetizations of the SF and free ferromagnetic electrode via the nonmagnetic insulating (I) spacer giving rise to giant spin-dependent reflection at the SF/I interface. These findings suggest that the proposed field-like-spin-torque MRAM may provide promising dual functionalities for both ‘reading’ and ‘writing’ processes which require lower critical current densities and faster writing and reading speeds. 其他題名： Sci Rep 出版者： London: Nature Publishing Group UK 出版日期： 2015-06-22 出處： Scientific reports, 2015-06, Vol.5 (1), p.11341-11341, Article 11341 資源來源： Publicly Available Content Database 版權： The Author(s) 2015 版權： Copyright Nature Publishing Group Jun 2015 版權： Copyright © 2015, Macmillan Publishers Limited 2015 Macmillan Publishers Limited 識別號： ISSN: 2045-2322 識別號： EISSN: 2045-2322 識別號： DOI: 10.1038/srep11341 識別號： PMID: 26095146
顯示於類別:	[物理學系] 期刊論文

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