Spin transfer torque in double barrier magnetic tunnel junctions

Theodonis, I; Kalitsov, A; Kioussis, N

dc.contributor.author	Theodonis, I	en
dc.contributor.author	Kalitsov, A	en
dc.contributor.author	Kioussis, N	en
dc.date.accessioned	2014-03-01T01:27:16Z
dc.date.available	2014-03-01T01:27:16Z
dc.date.issued	2007	en
dc.identifier.issn	0304-8853	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18375
dc.subject	Double barrier	en
dc.subject	Quantum well states	en
dc.subject	Spin transfer torque	en
dc.subject	Tunnel	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Electric currents	en
dc.subject.other	Electron tunneling	en
dc.subject.other	Fermi level	en
dc.subject.other	Ferromagnetism	en
dc.subject.other	Magnetic properties	en
dc.subject.other	Spin dynamics	en
dc.subject.other	Double barrier	en
dc.subject.other	Double barrier magnetic tunnel junctions (DBMTJ)	en
dc.subject.other	Quantum well states	en
dc.subject.other	Spin transfer torque	en
dc.subject.other	Semiconductor quantum wells	en
dc.title	Spin transfer torque in double barrier magnetic tunnel junctions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jmmm.2006.10.955	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jmmm.2006.10.955	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	We present tight-binding calculations of the current-induced spin torque in double-barrier magnetic tunnel junctions (DBMTJ) using the non-equilibrium Keldysh formalism. The components of the local spin torque in the central ferromagnetic region, parallel, T-vertical bar vertical bar, and perpendicular, T-perpendicular to, to the interface are strongly enhanced for certain thickness of the middle layer. The underlying mechanism for the spin torque enhancement is the relative position of the majority and minority quantum well states within the bias energy window around the Fermi level. Both T-vertical bar vertical bar and T-perpendicular to exhibit oscillatory behavior in the middle FM region. (c) 2006 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Magnetism and Magnetic Materials	en
dc.identifier.doi	10.1016/j.jmmm.2006.10.955	en
dc.identifier.isi	ISI:000247720400056	en
dc.identifier.volume	310	en
dc.identifier.issue	2 SUPPL. PART 3	en
dc.identifier.spage	2043	en
dc.identifier.epage	2045	en