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Interlayer magnetostatic coupling induced Co layer coercivity enhancement and exchange bias in [Pd/Co]/Cu/Co spin valves

Appl. Phys. Lett. 95, 172512 (2009); doi:10.1063/1.3257696

Published 30 October 2009

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P. Y. Yang, X. Y. Zhu, F. Zeng, and F. Pan
Department of Materials Science and Engineering, Laboratory of Advanced Materials, Tsinghua University, Beijing 100084, People's Republic of China
Interlayer stray field coupling in hybrid perpendicular/Cu/in-plane magnetic anisotropy [Pd/Co]/Cu/Co single spin valves and [Pd/Co]/Cu/Co/Cu/[Co/Pd] dual spin valves was investigated. Enhancements of Co layer coercivity were observed after ac or dc demagnetization of the samples. This effect originates from the pinning of Co domain walls by the in-plane stray field from Co/Pd stripe domains, and the enhancements are more efficient as the Co/Pd domain size decreases. Moreover, the magnetostatic interaction between the net in-plane Co/Pd remanent moments and the Co moments leads to exchange bias in the Co layer of the dual spin valve after the dc demagnetization. ©2009 American Institute of Physics
History: Received 2 September 2009; accepted 11 October 2009; published 30 October 2009
Permalink: http://link.aip.org/link/?APPLAB/95/172512/1
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KEYWORDS and PACS

Keywords
PACS
  • 75.70.Cn
    Magnetic properties of interfaces
  • 75.60.Ej
    Magnetization curves, hysteresis, Barkhausen and related effects
  • 75.60.Ch
    Magnetic domain walls and domain structure
  • 75.30.Gw
    Magnetic anisotropy
  • 75.30.Cr
    Saturation moments and magnetic susceptibilities in magnetically ordered materials
  • 75.30.Et
    Exchange and superexchange interactions in magnetically ordered materials
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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AIP is a member of CrossRef AIP

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