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Journal of Applied Physics / Volume 97 / Issue 11 / MAGNETISM AND SUPERCONDUCTIVITY

J. Appl. Phys. 97, 113907 (2005); http://dx.doi.org/10.1063/1.1925333 (4 pages)

The number of Cu lamination effect on current-perpendicular-to-plane giant-magnetoresistance of spin valves with Fe50Co50 alloy

H. Yuasa, H. Fukuzawa, H. Iwasaki, and M. Sahashi

Corporate Research and Development Center, Toshiba Corporation, 1, Komukai Toshiba-cho, Kawasaki 212-8582, Japan

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(Received 22 October 2004; accepted 11 April 2005; published online 1 June 2005)

The current-perpendicular-to-plane (CPP) giant-magnetoresistance (GMR) of spin valves with Fe50Co50 alloy was investigated. It has been reported that the Cu inserted in Fe50Co50 is effective for enhancing CPP-GMR. In this paper, we investigated the number of Cu lamination effect on CPP-GMR and clarified that higher CPP-GMR is obtained by decreasing the number of Cu layers. In order to ascertain the reason for this tendency, the crystalline structure and magnetization were examined. As a result, it was found that the d spacing of Fe50Co50 increases when the number of Cu layers is increased, although saturation magnetization does not change.

© 2005 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENT
  3. RESULTS
  4. DISCUSSION
    1. Magnetization
    2. Crystalline structure, d spacing
    3. Degree of crystalline orientation
  5. CONCLUSION

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KEYWORDS and PACS

Keywords

giant magnetoresistance, spin valves, iron alloys, cobalt alloys, magnetisation

PACS

  • 85.70.Kh

    Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.); domain-motion devices, etc.

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

  • 75.47.De

    Giant magnetoresistance

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1925333

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

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

For access to fully linked references, you need to log in.
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