A systematic study of exchange bias in MnPd/Co bilayers has been carried out, where the dependences of exchange bias, unidirectional anisotropy constant and coercivity on the thicknesses of MnPd and Co layers were investigated. A huge unidirectional anisotropy constant, J_K = 2.5 erg / cm² was observed, which is in reasonable agreement with the theoretical prediction based on the model by Meiklejohn and Bean. The angular dependences of exchange bias field and coercivity have also been examined showing that both exchange bias and coercivity follow 1 / cos α rule. © 2007 Elsevier B.V. All rights reserved.

Nam N.T., Phu Thuy N., Anh Tuan N., Nguyen Phuoc N., Suzuki T.

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Từ khóa : Coercive force; Electric potential; Magnetic anisotropy; Magnetic field effects; Manganese compounds; Mathematical models; Anisotropy constant; Bilayers; Exchange bias field; Magnetic thin films