We investigated the in-plane reorientation of magnetization in epitaxial Fe/MnPd bilayers. The samples with various thicknesses of MnPd and Fe layers present a conventional square and an unusual two-step exchange biased hysteresis loops at different temperature. The shape of the loops is reproduced using the coherent rotation model and including the relative orientation of the uniaxial anisotropy with respect to the exchange bias. The parallel and perpendicular uniaxial anisotropies in the ferromagnetic layer are linked to the aligned and the reoriented states, respectively. The magnetic reorientation between the aligned and the reoriented states, which is determined by the competition between the interface exchange coupling and the intrinsic uniaxial energies, is shown to be driven by the temperature, as well as the thickness of MnPd and Fe layers.
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15 March 2010
Research Article|
March 18 2010
In-plane reorientation of magnetization in epitaxial exchange biased Fe/MnPd bilayers
Qing-feng Zhan;
Qing-feng Zhan
Department of Materials Science,
University of Washington
, Seattle, Washington 98195, USA
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Kannan M. Krishnan
Kannan M. Krishnan
a)
Department of Materials Science,
University of Washington
, Seattle, Washington 98195, USA
Search for other works by this author on:
a)
Author to whom correspondence should be addressed. Electronic mail: kannanmk@u.washington.edu.
Appl. Phys. Lett. 96, 112506 (2010)
Article history
Received:
February 10 2010
Accepted:
February 26 2010
Citation
Qing-feng Zhan, Kannan M. Krishnan; In-plane reorientation of magnetization in epitaxial exchange biased Fe/MnPd bilayers. Appl. Phys. Lett. 15 March 2010; 96 (11): 112506. https://doi.org/10.1063/1.3367705
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