无机材料学报

• 研究论文 • 上一篇    下一篇

真空退火Co/Pt多层膜的结构、磁及磁光特性分析

李明; 蒋志红; 沈德芳   

  1. 中国科学院上海冶金研究所; 上海200050
  • 收稿日期:1997-05-06 修回日期:1997-05-21 出版日期:1998-06-20 网络出版日期:1998-06-20

Analysis on Structure, Magnetic and Magneto-Optical Properties of Vacuum Annealed Co/Pt Multilayer Films

LI Ming; JIANG Zhi-Hong; SHEN De-Fang   

  1. Shanghai Institute of Metallurgy; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1997-05-06 Revised:1997-05-21 Published:1998-06-20 Online:1998-06-20

摘要: 本文用直流磁控溅射方法制备了Co/Pt多层膜,并对其进行了较为细致的真空退火处理,结果表明,适度的低温退火可增加Co/Pt多层膜的矫顽力,而并不削弱其磁滞克尔回线的矩形特征.当退火温度达到300℃以后,Co/Pt多层膜的矫顽力、垂直各向异性和克尔角将强烈下降,晶体结构的改善及应力的释放、晶粒的增长、层间原子扩散引起的Co层有效厚度减薄,进而居里温度的下降,分别是Co/Pt多层膜在低温、中温、高温退火过程中,磁及磁光性能变化的主要机制.

关键词: 磁光薄膜, 多层膜, 退火, 矫顽力

Abstract: Co/Pt multilayer films were prepared by DC magnetron sputtering. Detailed vacuum annealing was carried out on them. The results show that moderate annealing at lower temperature can imcrease
the coercivity in Co/Pt multilayer films while not affect the shape of Kerr hysterisis loops. Annealing at or above 300℃ will cause the drastic decrease in coercivity, perpendicular magnetic anisotropy and
Kerr rotation in Co/Pt multilayer films. The improvement of crystal structure and the release of stresses in films, the growth of grains, the reduction of effective Co layer thickness caused by atom diffusion
between layers and further the decrease in Curie temperature are considered to be responsible for the changes in magnetic and magneto-optical properties for Co/Pt multilayer films during lower, middle and
higher temperature annealing, respectively.

Key words: magneto-optical films, multilayer films, annealing, coercivity

中图分类号: