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Phys. Rev. B 62, 8654–8657 (2000)

Structure and magnetic properties of exchange-biased polycrystalline Fe/MnPd bilayers

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Y. J. Tang
State Key Laboratory for Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, People’s Republic of China

B. F. P. Roos, T. Mewes, A. R. Frank, M. Rickart, M. Bauer, S. O. Demokritov, and B. Hillebrands
Fachbereich Physik und Schwerpunkt Materialwissenschaften, Universität Kaiserslautern, 67663 Kaiserslautern, Germany

X. Zhou, B. Q. Liang, X. Chen, and W. S. Zhan
State Key Laboratory for Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, People’s Republic of China

Received 18 January 2000; published in the issue dated 1 October 2000

We report the fabrication of polycrystalline Fe/MnPd bilayers, which show the exchange-bias effects. We show that the exchange-bias effect, described by unidirectional anisotropy, is also accompanied by induced uniaxial and fourfold in-plane anisotropy contributions in the system. Using the Stoner-Wohlfarth model, all in-plane anisotropy contributions to the total free energy are determined for the polycrystalline samples from the fit of the in-plane angular dependence of Heb and the coercivity Hc. A mechanism explaining the presence of the induced higher-order anisotropy contributions in an exchange-bias system is proposed.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.62.8654
DOI:
10.1103/PhysRevB.62.8654
PACS:
75.70.Ak, 75.30.Et, 75.30.Gw, 75.50.Ee
 
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