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研究了直流磁控溅射法制备的Ｎｉ８１Ｆｅ１９／Ｃｒ８２Ａｌ１８ 双层膜中的交换耦合．样品的室温矫顽力与１／ｔ３／２ＦＭ（ｔＦＭ为铁磁层厚度） 近似成正比例关系，从而表明在Ｎｉ８１Ｆｅ１９／Ｃｒ８２Ａｌ１８ 中交换耦合为铁磁／ 反铁磁界面的随机相互作用．另外还讨论了反铁磁层厚度对交换偏置的影响．
The exchange coupling in Ni81Fe19 / Cr82Al18 bilayers prepared by DC magnetron sputtering was studied. The room temperature coercivity of the sample is approximately proportional to 1 / t3 / 2FM (tFM is the thickness of the ferromagnetic layer), indicating a random interaction of exchange coupling as ferromagnetic / antiferromagnetic interface in Ni81Fe19 / Cr82Al18. The effect of anti-ferromagnetic layer thickness on the switching bias is also discussed.