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Applied Physics Letters / Volume 96 / Issue 2 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 96, 022514 (2010); http://dx.doi.org/10.1063/1.3284515 (3 pages)

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

D. Bedau1, H. Liu1, J.-J. Bouzaglou1,2, A. D. Kent1, J. Z. Sun3, J. A. Katine4, E. E. Fullerton5, and S. Mangin2

1Department of Physics, New York University, 4 Washington Place, New York, New York 10003, USA
2IJL, Nancy-Université, UMR CNRS 7198, F-54042 Vandoeuvre Cedex, France
3IBM T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598, USA
4San Jose Research Center, Hitachi-GST, San Jose, California 95135, USA
5CMRR, University of California, San Diego, La Jolla, California 92093-0401, USA

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(Received 30 October 2009; accepted 10 December 2009; published online 14 January 2010)

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

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KEYWORDS and PACS

Keywords

perpendicular magnetic anisotropy, spin valves

PACS

  • 85.75.-d

    Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

  • 75.47.-m

    Magnetotransport phenomena; materials for magnetotransport

  • 75.30.Gw

    Magnetic anisotropy

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3284515

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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