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Generation of coherent spin-wave modes in yttrium iron garnet microdiscs by spin-orbit torque

Nature communications, 2016-01, Vol.7 (1), p.10377-10377, Article 10377 [Peer Reviewed Journal]

Copyright Nature Publishing Group Jan 2016 ;Distributed under a Creative Commons Attribution 4.0 International License ;Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. 2016 Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/ncomms10377 ;PMID: 26815737

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  • Title:
    Generation of coherent spin-wave modes in yttrium iron garnet microdiscs by spin-orbit torque
  • Author: Collet, M ; de Milly, X ; d'Allivy Kelly, O ; Naletov, V V ; Bernard, R ; Bortolotti, P ; Ben Youssef, J ; Demidov, V E ; Demokritov, S O ; Prieto, J L ; Muñoz, M ; Cros, V ; Anane, A ; de Loubens, G ; Klein, O
  • Subjects: Condensed Matter ; Materials Science ; Physics
  • Is Part Of: Nature communications, 2016-01, Vol.7 (1), p.10377-10377, Article 10377
  • Description: In recent years, spin-orbit effects have been widely used to produce and detect spin currents in spintronic devices. The peculiar symmetry of the spin Hall effect allows creation of a spin accumulation at the interface between a metal with strong spin-orbit interaction and a magnetic insulator, which can lead to a net pure spin current flowing from the metal into the insulator. This spin current applies a torque on the magnetization, which can eventually be driven into steady motion. Tailoring this experiment on extended films has proven to be elusive, probably due to mode competition. This requires the reduction of both the thickness and lateral size to reach full damping compensation. Here we show clear evidence of coherent spin-orbit torque-induced auto-oscillation in micron-sized yttrium iron garnet discs of thickness 20 nm. Our results emphasize the key role of quasi-degenerate spin-wave modes, which increase the threshold current.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2041-1723
    EISSN: 2041-1723
    DOI: 10.1038/ncomms10377
    PMID: 26815737
  • Source: Hyper Article en Ligne (HAL) (Open Access)
    PubMed Central
    ProQuest Central
    DOAJ Directory of Open Access Journals
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