Anomalous bias dependence of spin torque in magnetic tunnel junctions

Theodonis, I; Kioussis, N; Kalitsov, A; Chshiev, M; Butler, WH

dc.contributor.author	Theodonis, I	en
dc.contributor.author	Kioussis, N	en
dc.contributor.author	Kalitsov, A	en
dc.contributor.author	Chshiev, M	en
dc.contributor.author	Butler, WH	en
dc.date.accessioned	2014-03-01T01:23:37Z
dc.date.available	2014-03-01T01:23:37Z
dc.date.issued	2006	en
dc.identifier.issn	0031-9007	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17049
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	Antiferromagnetism	en
dc.subject.other	Ferromagnetism	en
dc.subject.other	Torque	en
dc.subject.other	Tunnel junctions	en
dc.subject.other	Anomalous bias dependence	en
dc.subject.other	Magnetic tunnels	en
dc.subject.other	Spin torque	en
dc.subject.other	Spin transfer	en
dc.subject.other	Interfaces (materials)	en
dc.title	Anomalous bias dependence of spin torque in magnetic tunnel junctions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1103/PhysRevLett.97.237205	en
heal.identifier.secondary	http://dx.doi.org/10.1103/PhysRevLett.97.237205	en
heal.identifier.secondary	237205	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	We predict an anomalous bias dependence of the spin transfer torque parallel to the interface, T∥, in magnetic tunnel junctions, which can be selectively tuned by the exchange splitting. It may exhibit a sign reversal without a corresponding sign reversal of the bias or even a quadratic bias dependence. We demonstrate that the underlying mechanism is the interplay of spin currents for the ferromagnetic (antiferromagnetic) configurations, which vary linearly (quadratically) with bias, respectively, due to the symmetric (asymmetric) nature of the barrier. The spin transfer torque perpendicular to interface exhibits a quadratic bias dependence. © 2006 The American Physical Society.	en
heal.publisher	AMERICAN PHYSICAL SOC	en
heal.journalName	Physical Review Letters	en
dc.identifier.doi	10.1103/PhysRevLett.97.237205	en
dc.identifier.isi	ISI:000242708900061	en
dc.identifier.volume	97	en
dc.identifier.issue	23	en