Nii_(81)Fe_(19)/Cr_(82)Al_(18)双层膜中的交换偏置

EXCHANGE COUPLING IN Nii_(81)Fe_(19)/Cr_(82)Al_(18) BILAYERS

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．

In P y /CrAl bilayers (where P y =Ni\-\{81\}Fe\-\{19\}),the coercivity at room temperature is found to be a linear function of 1/ t 3/2 FM ,indicating the existence of random exchange interaction at the FM/AFM interface (FM=ferromagnetic,AFM=antiferromagnetic).The AFM layer thickness dependencies of the H e and H c are also studied.