Co_2Ag_(98)颗粒膜中磁光克尔效应的增强

THE MAGNETO-OPTICAL KERR EFFECT ENHAN CEMENT IN Co_2Ag_(98) GRANULAR FILMS 

通过Ar离子束溅射仪制备了Co2Ag98磁性颗粒膜样品,并且分别在100、250、400、500℃下进行了退火.利用磁光克尔谱仪、椭圆偏振光谱仪对上述系列样品的光学常数、复介电函数、磁光克尔参数在室温下进行了测量.实验结果表明随着退火温度的升高,磁光克尔旋转角θk和椭偏率εk增大,并且在Ag的等离子吸收边附近出现了大的类共振增强峰,峰的位置随退火温度的升高发生红移.通过实验数据分析,这种类共振磁光点克尔效应增强是由于Ag陡峭的等离子振荡边作用的结果.

The magneto optical Kerr effect enhancement in Co 2Ag 98 granular magnetic films annealed at 100, 250, 400, 500℃ was studied. The optical constants, the complex dielectric function and magneto optical Kerr parameters were measured at room temperature. The strong Kerr effect enhancement was observed around the Ag plasma edge. With the annealing temperature increasing, the values of the Kerr rotation θ k and Kerr ellipticity ε k increase, the resonance like peaks appear in the Kerr rotation, and the peak positions are shifted toward the low energy region. From the analysis of the experiment data, it is concluded that the magneto optical Kerr effect enhancement is due to the presence of the steep plasma edge.