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用磁控溅射法制备了一系列 Nix Si O2 (1 - x) 样品 ,并对部分样品作快速退火处理 ,室温下采用椭圆偏振光谱仪和磁光谱仪分别在 1.5～ 4.5 e V的光子能量区测量了样品的复介电常数谱和极向复磁光克尔谱 ,研究了这种金属 -绝缘体型颗粒膜的光学和磁光性质 .发现调整合适的金属含量或对样品作退火处理 ,可以观察到复介电常数的实部从正到负的连续变化 ,而且在一定光子能量区 ,其值为零 ;介电张量的非对角元和光学常数对其磁光克尔角的增强起重要作用
A series of samples of NixSi O2 (1 - x) were prepared by magnetron sputtering. Some samples were rapidly annealed at room temperature and measured in the photon energy region of 1.5-4.5 eV by ellipsometer and magnetic spectrometer respectively The complex dielectric constant spectra and polar complex magneto-optical Kerr spectra of the samples were investigated, and the optical and magneto-optical properties of the metal-insulator-based granular films were investigated. It was found that adjusting the appropriate metal content or annealing the sample To the continuous change of the real part of the complex permittivity from positive to negative, and its value is zero in a certain photon energy region. The diagonal elements and optical constants of the dielectric tensor enhance the magneto-optical Kerr angles Important role