(Nd, Pr)Gd/FeCo多层膜的磁性和磁光性质

Xiangyou Yu, H. Watabe, S. Iwata, S. Tsunashima, S. Uchiyama
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引用次数: 1

摘要

研究了用射频磁控溅射法制备的(Nd,Pr)Gd/FeCo多层膜的磁性和磁光性能。通过调整各层的组成、厚度和双层周期,制备了具有良好方形克尔磁滞回线的垂直磁化薄膜,这是高密度磁记录介质所必需的。在本研究的框架内,在Nd含量约为33%,Co含量约为10%,双层周期为1 nm,双层厚度比为1的条件下获得了最佳结果。在MO存储器中读出的Kerr值在400 nm处为0.36°,比Tb-FeCo高约30%。
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Magnetic and magneto-optic properties of (Nd, Pr)Gd/FeCo multilayers
Magnetic and magneto-optic (MO) properties are investigated for (Nd,Pr)Gd/FeCo multilayer films (MLFs) prepared by means of rf magnetron sputtering. Perpendicularly magnetized films with a good square Kerr hysteresis loop, which is necessary for high density magnetic recording media, are prepared by adjusting the composition as well as the thickness of each layer and bilayer period. Within the frame of this work, the best result is obtained for conditions of approximately 33% Nd, approximately 10% Co, bilayer period of 1 nm, and bilayer thickness ratio of 1. The figure of merit for the Kerr read out in MO memory is found to be 0.36 deg at 400 nm, which is about 30% larger than that for Tb-FeCo.
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