含铋柘榴石膜的氧化与还原处理对光吸收的影响

含铋柘榴石膜的氧化与还原处理对光吸收的影响 INFLUENCE OF OXIDIZING AND REDUCING TREATMENT ON OPTICAL ABSORPTION PROPERTIES OF LPE FILMS OF Bi SUBSTITUED IRON GARNETS 易西美 Yi Ximei first-author 尹邦勇 Yin Bangyong 周殿清 Zhou Dianqing 周正国 Zhou Zhengguo 杨根娣 Yong Gendi 本文研究了（Bi Pr Gd Yb） 3 （Fe A1） 5 O 12 和（Y Lu Bi） 3 （Fe Ga） 5 O 12 含铋柘榴石外延膜的氧化与还原处理对光吸收的影响。其结果是:通过K 2 Cr 2 O 7 水溶液的氧化处理能使样品0.8μm处的光吸收系数α降低;通过N 2 H 4 ·H 2 SO 4 水溶液和N 2 H 4 ·H 2 O水溶液的还原处理使α增大。我们认为:考虑经过氧化与还原处理使Fe 2+ 和Fe 4+ 的浓度改变以及使膜内的氧空穴被填充或产生可以解释这些结果。因为在氧化处理之后,法拉弟旅转系数θ F 保持不变,所以,由于吸收系数α的减少磁光优值θ F /α有相当大的增强。 In this paper influence of oxidizing and reducing treatment on optical absorption properties of LPE films of Bi substitued iron garnets （BiPrGdYb）. （FeA1） 5 O 12 and （YLuBi） 3 （FeGa） 5 O 12 are investigated. It turned out that （1） the optical absorption coefficient α at 0.8μm decreases by oxidizing treat-ment in a K 2 Cr 2 O 7 aqeous solution （2） the α increases by reducing treat-ment in both N 2 H 4 .H 2 SO 4 aqeous solution and N 2 H 2 ·H 2 O aqeous solution We think that these results were explained by considering the content of Fe 2+ and Fe 4+ changes and the oxygen vacacies in films are filled in or are created by oxidizing and reducing treetment Since the Faraday rotation coefficient θF remains unchanged after oxidizing treatment, the magneto—optical fignre of merit θF/α is considerably enhanced by the decrease of the absorption coefficient α. 光吸收 含铋柘榴石 外延膜 氧化与还原处理 optical absorption Bi substituted iron garnets LPE films oxidizing and reducing treatment 1988-01-01 2021-04-01 1