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Ultrafast spin-transfer switching in spin valve nanopillars with perpendicular anisotropy

Source: Appl. Phys. Lett. 96, 022514 (2010); doi:10.1063/1.3284515

Published 14 January 2010

KEYWORDS and PACS
Keywords
PACS
  • 85.75.-d
    Magnetoelectronics; spintronics
  • 75.70.Cn
    Magnetic properties of interfaces
  • 75.47.-m
    Magnetotransport phenomena; materials for magnetotransport
  • 75.30.Gw
    Magnetic anisotropy
  • 75.60.Ej
    Magnetization curves, hysteresis, Barkhausen and related effects
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9601 (online)
Publisher:
AIP is a member of CrossRef AIP
D. Bedau,1 H. Liu,1 J.-J. Bouzaglou,1,5 A. D. Kent,1 J. Z. Sun,2 J. A. Katine,3 E. E. Fullerton,4 and S. Mangin5
1Department of Physics, New York University, 4 Washington Place, New York, New York 10003, USA
2IBM T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598, USA
3San Jose Research Center, Hitachi-GST, San Jose, California 95135, USA
4CMRR, University of California, San Diego, La Jolla, California 92093-0401, USA
5IJL, Nancy-Université, UMR CNRS 7198, F-54042 Vandoeuvre Cedex, France
Spin-transfer switching with short current pulses has been studied in spin-valve nanopillars with perpendicularly magnetized free and reference layers. Magnetization switching with current pulses as short as 300 ps is demonstrated. The pulse amplitude needed to reverse the magnetization is shown to be inversely proportional to the pulse duration, consistent with a macrospin spin-transfer model. However, the pulse amplitude duration switching boundary depends on the applied field much more strongly than predicted by the zero temperature macrospin model. The results also demonstrate that there is an optimal pulse length that minimizes the energy required to reverse the magnetization. ©2010 American Institute of Physics
History: Received 30 October 2009; accepted 10 December 2009; published 14 January 2010
Permalink: http://link.aip.org/link/?APPLAB/96/022514/1

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