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Detailed description of exchange bias in CoFe/IrMn | | F. Radu
; A. Westphalen
; K. Theis-Bröhl
; H. Zabel
; | | Date: |
28 Apr 2005 | | Subject: | Materials Science | cond-mat.mtrl-sci | | Abstract: | We show simulations using a modified Meiklejohn and Bean model and compare them with longitudinal and transverse hysteresis loops (vector MOKE) from CoFe/IrMn exchange biased bilayers. In the model the interfacial exchange energy is split in two parts, a unidirectional contribution responsible for the exchange bias shift, and an effective uniaxial anisotropy giving rise to the enhanced coercive field observed in all F/AF systems. This is a key feature of the model which we attribute to a spin-glass like behavior of the interface. The simulations are in excellent agreement with the azimuthal dependence of the exchange bias and coercive fields for the complete 360$^circ$ angular range. | | Source: | arXiv, cond-mat/0504764 | | Services: | Forum | Review | PDF | Favorites | |
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