Dy2（Fe1－xGax）17化合物的57FeMssbauer谱和磁性质研究

MAGNETIC PROPERTIES AND MOSSBAUER STUDY OF THE Dy 2(Fe 1- x Ga x ) 17 COMPOUNDS

对Ｄｙ２（Ｆｅ１－ｘＧａｘ）１７化合物的磁性和Ｍｓｓｂａｕｅｒ效应进行了系统的研究．Ｇａ对Ｆｅ的有序替代导致化合物的居里温度的变化，并且在Ｇａ浓度ｘ＝０．２时有极大值．Ｍｓｓｂａｕｅｒ谱分析表明，化合物内禀性质的变化与Ｇａ原子择优占据结构中１２ｊ，４ｆ，６ｇ晶位有关．

Intrinsic properties and Mossbauer effects of the compounds Dy 2(Fe 1- x Ga x ) 17 system were investigted.The substitution of Ga for Fe led to an vary of T c ,with a maximum at about x =0.2. Mossbauer analysis shows that the Ga atoms preferentially occupies the 12j 4f 6g sites in the Th 2Ni 17 structure.