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用射频溅射装置制备了La Zn替代磁铅石型锶铁氧体 (SrM)薄膜 (LaxSr1 xZnxFe12 xO19,0≤x≤ 0 4) ,通过对样品微结构及磁性的研究 ,发现替代可以有效控制薄膜中晶粒的生长 ,合适的替代量 (x =0 4)可得到平均尺寸大约为 12nm的六角片状晶粒 .饱和磁化强度Ms 随替代量x的增加出现极大值 ,而矫顽力Hc 则呈上升趋势 .同时替代使薄膜室温下的矫顽力温度系数 dHcdT rt得到显著改善 ,从正份样品的 430Am 1K 1降到了大约 - 40Am 1K 1(x =0 4) .
LaZn is substituted for the magnetoplumbite strontium ferrite (SrM) thin film (LaxSr1xZnxFe12xO19, 0≤x≤0 4) by using a radio frequency sputtering device. By studying the microstructure and magnetic properties of the sample, it is found that the substitution can effectively control For the growth of the grains in the film, a hexagonal platelet with an average size of about 12 nm can be obtained by a suitable substitution amount (x = 0 4) .The saturation magnetization Ms increases with the substitution amount x, while the coercivity Hc increased at the same time, and at the same time, the coercivity temperature coefficient dHcdT rt at room temperature decreased significantly from 430Am 1K 1 to about -40Am 1K 1 (x = 0 4).