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用铁磁畴壁模型研究了非补偿界面铁磁/反铁磁双层膜中冷却场(包括大小及其方向)对交换偏置场hE的影响.结果表明:当冷却场的方向与反铁磁层磁易轴一致时,hE大小与冷却场大小无关.当冷却场的方向偏离磁易轴时,hE的大小随偏离角度的增大有缓慢的改变,但当冷却场的方向偏离到临界角度γc处,hE的大小发生突变,其γc的大小随冷却场的增大而增大.特别是当冷却场的偏离角度大于γc后,hE出现由负转正的现象,其转变点还与冷却场的大小有关.另外,hE与铁磁层原子层数NF的关系会发生由hE∝NF-1向hE∝NF-λ的转变,其中λ>1.其发生转变的条件与NF、冷却场大小和方向密切相关.
The influence of the cooling field (including the size and direction) on the exchange bias field hE in the non-compensated interface ferromagnetic / antiferromagnetic bilayer was investigated by using the ferromagnetic domain wall model. The results show that when the direction of the cooling field is opposite to that of the antiferrox When the magnetospheric magnetic axis coincides, the size of hE has nothing to do with the size of the cooling field.When the direction of the cooling field deviates from the magnetic easy axis, the size of hE changes slowly with the increase of the deviation angle, but when the direction of the cooling field deviates from the critical Angle γc at the size of hE mutation occurs, the size of γc increases with the cooling field increases.Especially when the cooling field off angle is greater than γc, hE appears from negative to positive phenomenon, the transition point and cooling HEαNF-1 hEαNF-λ transition occurs, where λ> 1. The conditions of its transition and NF, the cooling field The size and direction are closely related.