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用热分解法制备的Bi,Al替DyIG磁光薄膜虽然是纳米晶 ,但由于其晶界分布不均匀、晶粒较大且均匀性差 ,当用于磁光记录时 ,晶界将产生较大的噪音。而掺Rb的Bi,Al替DyIG磁光薄膜不仅可以降低晶化温度 ,而且晶粒明显细化 ,最大晶粒尺寸从 10 0nm下降到 5 0nm左右 ,平均晶粒尺寸下降为 30nm左右。并且晶粒的均匀性明显改善 ,掺入的Rb以Rb2 O固溶体的形式存在于磁光薄膜表面 ,填补了薄膜表面的凹凸不平 ,使薄膜表面反射率增加 ,信噪比增大。因此掺Rb可使纳米晶Bi,Al替DyIG磁光薄膜的性能大大提高
Bi, Al DyIG magneto-optical thin films prepared by thermal decomposition are nanocrystals, but due to their uneven grain boundary distribution, large grain size and poor uniformity, the grain boundaries will be larger when used for magneto-optical recording Noise The doped Rb Bi, Al DyIG magneto-optical thin film can not only reduce the crystallization temperature, and the grain refinement significantly, the maximum grain size from 10 0nm down to about 50nm, the average grain size decreased to about 30nm. And the uniformity of the crystal grains is obviously improved. The Rb doped in the form of Rb2 O solid solution exists on the surface of the magneto-optical thin film, filling up the uneven surface of the film, increasing the reflectivity of the film surface and increasing the signal-to-noise ratio. Therefore, doped Rb nanocrystalline Bi, Al for DyIG magneto-optical thin film performance greatly improved