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Condensed Matter > Strongly Correlated Electrons

arXiv:1206.4125 (cond-mat)
[Submitted on 19 Jun 2012 (v1), last revised 27 Jul 2012 (this version, v2)]

Title:Magnetic vortex-antivortex crystals generated by spin-polarized current

Authors:Yuri Gaididei, Oleksii M. Volkov, Volodymyr P. Kravchuk, Denis D. Sheka
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Abstract:We study vortex pattern formation in thin ferromagnetic films under the action of strong spin-polarized currents. Considering the currents which are polarized along the normal of the film plane, we determine the critical current above which the film goes to a saturated state with all magnetic moments being perpendicular to the film plane. We show that stable square vortex-antivortex superlattices (\emph{vortex crystals}) appears slightly below the critical current. The melting of the vortex crystal occurs with current further decreasing. A mechanism of current-induced periodic vortex-antivortex lattice formation is proposed. Micromagnetic simulations confirm our analytical results with a high accuracy.
Comments: 12 pages, 11 figures
Subjects: Strongly Correlated Electrons (cond-mat.str-el); Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Cite as: arXiv:1206.4125 [cond-mat.str-el]
  (or arXiv:1206.4125v2 [cond-mat.str-el] for this version)
  https://doi.org/10.48550/arXiv.1206.4125
Related DOI: https://doi.org/10.1103/PhysRevB.86.144401

Submission history

From: Volodymyr Kravchuk P. [view email]
[v1] Tue, 19 Jun 2012 05:54:42 UTC (718 KB)
[v2] Fri, 27 Jul 2012 13:28:28 UTC (636 KB)
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