论文部分内容阅读
采用磁控溅射的方法制备了一组以(Ni0·81Fe0·19)1-xCrx作为缓冲层的NiFe/PtMn双层膜样品,研究了NiFe/PtMn双层膜的形成过程和热稳定性.实验表明,Cr成分的不同会引起NiFe/PtMn双层膜中PtMn层晶粒尺寸的不同,使NiFe/PtMn双层膜的交换偏置场与PtMn层厚度之间呈现不同的变化关系.热稳定性实验表明,PtMn晶粒尺寸较大的样品,出现交换偏置现象所需要的临界厚度较小,热稳定性好,这与Mauri的理论模型一致.
A series of NiFe / PtMn bilayers with (Ni0.81Fe0.19) 1-xCrx as buffer layer were prepared by magnetron sputtering. The formation process and thermal stability of NiFe / PtMn bilayers were studied. The experimental results show that the different Cr content causes the different grain size of the PtMn layer in the NiFe / PtMn bilayer, which makes the exchange bias field and the thickness of the PtMn layer vary with the thickness of the NiFe / PtMn bilayer. Experiments show that the sample with larger PtMn grain size has smaller critical thickness and good thermal stability for the exchange bias phenomenon, which is consistent with Mauri’s theoretical model.