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本文报道用热分解法在玻璃衬底上制备了Ａｌ和Ｇａ取代的Ｂｉ：ＤＹＩＧ薄膜，对其磁和磁光特性做了详细研究．Ａｌ和Ｇａ取代的薄膜均可获得好的矩形比和高的矫顽力．对于Ｂｉ１．２Ｄｙ１．８Ｆｅ５－ｘＭＸＯ１２（Ｍ＝Ａ１，ＧＺ）薄膜，Ａ１和Ｇ２的最佳替代成份分别为１．０和Ｇ．７；最佳晶化温度分别为７００ｏ℃和６７５℃．在波长５１０ｎｍ附近，法拉第旋转角可达８°／ｕｍ左右．光学吸收和品质因子的研究结果表明，Ａｌ和Ｇａ取代能够影响光学吸收和品质因子，其中Ｇａ取代对光学吸收和品质因子的影响较大．
This paper reports the preparation of Al and Ga substituted Bi: DYIG thin films on glass substrates by thermal decomposition. The magnetic and magneto-optical properties of these films have been studied in detail. Both Al and Ga substituted films give good squareness and high coercivity. For Bi1.2Dy1.8Fe5-xMXO12 (M = A1, GZ) films, the best substitution components for A1 and G2 were 1.0 and G, respectively. 7; the best crystallization temperature is 700o ℃ and 675 ℃ respectively. Near the wavelength of 510nm, Faraday rotation angle up to about 8 ° / um. The results of optical absorption and quality factor show that the substitution of Al and Ga can affect the optical absorption and quality factor, and the Ga substitution has a great influence on the optical absorption and quality factor.