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Phase Diagram of Antiferromagnetically Exchange-Coupled Bilayer |
| GUO Guang-Hua1,2, ZHANG Guang-Fu1, SUN Li-Yuan1, Peter A. J. de Groot2 |
| 1School of Physics Science and Technology, Central South University, Changsha 4100832School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom |
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| Cite this article: |
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GUO Guang-Hua, ZHANG Guang-Fu, SUN Li-Yuan et al 2008 Chin. Phys. Lett. 25 2634-2637 |
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Abstract Magnetic hysteresis properties of antiferromagnetically exchange-coupled bilayer structures, in which the two magnetic layers have different magnetic parameters and thicknesses, are studied within the framework of the Stoner--Wohlfarth model. Analytical expressions for the switching fields corresponding to the linear magnetic states are obtained. By adjusting the magnetic parameters or thicknesses of layers, nine different types of easy-axis hysteresis loops may exist. The phase diagram of easy-axis hysteresis loops is mapped in the k1 and k2 plane, where k1 and k2 are the ratios of magnetic anisotropy to the interlayer exchange coupling of the two magnetic layers, respectively.
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| Keywords:
75.30.Ks
75.60.Ej
75.70.-i
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Received: 18 March 2008
Published: 26 June 2008
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| PACS: |
75.30.Ks
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75.60.Ej
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(Magnetization curves, hysteresis, Barkhausen and related effects)
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75.70.-i
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(Magnetic properties of thin films, surfaces, and interfaces)
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