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F. Dorfbauer, D. Süss, J. McCord, M. Kirschner, T. Schrefl, J. Fidler:
"Micromagnetic simulation of asymmetric magnetization reversal in exchange biased bilayers";
Journal of Magnetism and Magnetic Materials, 290-291 (2005), 754 - 757.

Hysteresis loops were calculated for a model with ferromagnetic grains spin-flop coupled to interacting antiferromagnetic grains with randomly distributed easy axes. The interface between these two layers is assumed to be fully compensated. Field cooling simulated by a Monte-Carlo algorithm and subsequent calculation of the hystersis loop reveals asymmetries in the ascending and descending part of the hysteresis loop, respectively. On the descending branch a steep change of the magnetization can be observed. On the ascending branch homogeneous rotations of the magnetization cause a smoother change of the magnetization. The strong asymmetries vanish after a few hysteresis loop calculations.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05938183

http://dx.doi.org/10.1016/j.jmmm.2004.11.354