MO磁光薄膜的光致局域热研究  

THE STUDY OF LASER INDUCED LOCAL HEATING OF MO MULTILAYER

作　　者：周健[1] 荀坤[1] 刘世勇[1] 沈德芳[1] 

机构地区：[1]中国科学院上海冶金研究所

出　　处：《物理学报》1999年第4期620-627,共8页Acta Physica Sinica

摘　　要：以激光照射下ＴｂＦｅＣｏ四层结构为例，通过体积功率函数ｇ的纵向分布，分析了ＭＯ盘片各层的光能吸收情况．借助有限元方法对热扩散方程进行数值运算，给出了多层膜膜体温度的时空分布，分析了各层中的热扩散情况．通过对影响热磁记录的激光功率、激光照射时间和表面热流速率γ等因素的研究，给出了适合研究体系的激光功率、激光照射时间和表面热流速率．旨在通过ＴｂＦｅＣｏ这一特例的热学分析，为其它的光盘（如ＤＶＤＲＯＭ）的热学研究提供借鉴．Abstract For a TbFeCo quadrilayer illuminated by laser beam,absorption of the laser power within different layers was considered by analysizing the rate of absorption of energy per unit volume.With the help of implicit method,the profile of temperature of the multilayer was given and the diffusion of heat was studied.The effect of laser power,laser duration and the convection loss at the front surface upon the thermal characteristics of the multilayer was investigated.This thermal analysis procedure provided a good example for the thermal investigation within other optical disk systems.

关 键 词：磁光材料 光能吸收 MO多层膜 光致局域热 

分 类 号：O482.55[理学—固体物理] TQ581[理学—物理]