Article: Macrospin and micromagnetic studies of tilted polarizer spin-torque nano-oscillators

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TitleMacrospin and micromagnetic studies of tilted polarizer spin-torque nano-oscillators
AuthorsZhou, Y1
Zhang, H2
Liu, Y2
Åkerman, J3 4
Issue Date2012
PublisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
CitationJournal Of Applied Physics, 2012, v. 112 n. 6 [How to Cite?]
DOI: http://dx.doi.org/10.1063/1.4752265
AbstractUsing nonlinear dynamical systems theory, we analytically studied a spin-torque device in which the magnetization of the polarizer (the fixed layer) is tilted at an arbitrary angle out of the thin-film plane. While the analytical theory can determine the major features of the system, macrospin simulations were employed to demonstrate the unique characteristics of the system, such as the hysteretic switching between bistable states. Material dependencies of the dynamic and static state diagrams were also studied in the framework of the macrospin model. Full-scale micromagnetics simulations were finally performed to reveal more subtle features of the dynamics of such tilted polarizer systems. Both the macrospin and micromagnetics simulations gave quantitatively the same results as our analytical theory. © 2012 American Institute of Physics.
ISSN0021-8979
2011 Impact Factor: 2.168
2011 SCImago Journal Rankings: 0.139
DOIhttp://dx.doi.org/10.1063/1.4752265
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorZhou, Y
dc.contributor.authorZhang, H
dc.contributor.authorLiu, Y
dc.contributor.authorÅkerman, J
dc.date.accessioned2012-08-16T05:56:37Z
dc.date.available2012-08-16T05:56:37Z
dc.date.issued2012
dc.description.abstractUsing nonlinear dynamical systems theory, we analytically studied a spin-torque device in which the magnetization of the polarizer (the fixed layer) is tilted at an arbitrary angle out of the thin-film plane. While the analytical theory can determine the major features of the system, macrospin simulations were employed to demonstrate the unique characteristics of the system, such as the hysteretic switching between bistable states. Material dependencies of the dynamic and static state diagrams were also studied in the framework of the macrospin model. Full-scale micromagnetics simulations were finally performed to reveal more subtle features of the dynamics of such tilted polarizer systems. Both the macrospin and micromagnetics simulations gave quantitatively the same results as our analytical theory. © 2012 American Institute of Physics.
dc.description.naturepublished_or_final_version
dc.identifier.citationJournal Of Applied Physics, 2012, v. 112 n. 6 [How to Cite?]
DOI: http://dx.doi.org/10.1063/1.4752265
dc.identifier.doihttp://dx.doi.org/10.1063/1.4752265
dc.identifier.hkuros202149
dc.identifier.issn0021-8979
2011 Impact Factor: 2.168
2011 SCImago Journal Rankings: 0.139
dc.identifier.issue6
dc.identifier.scopuseid_2-s2.0-84867063303
dc.identifier.urihttp://hdl.handle.net/10722/159785
dc.identifier.volume112
dc.languageeng
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
dc.publisher.placeUnited States
dc.relation.ispartofJournal of Applied Physics
dc.relation.referencesReferences in Scopus
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License
dc.titleMacrospin and micromagnetic studies of tilted polarizer spin-torque nano-oscillators
dc.typeArticle
Author Affiliations
  1. The University of Hong Kong
  2. Tongji University
  3. The Royal Institute of Technology (KTH)
  4. Göteborgs Universitet