金属间化合物PrMn_6Sn_6的结构、磁性与^(119)Sn穆斯堡尔谱研究  

Structure,magnetism and ^(119)Sn Mssbauer spectral study on intermetallic compound PrMn_6Sn_6

作　　者：黄彦君[1] 厉淑贞[1] 韩志达[1] 吕丽娅[2] 夏元复[1] 

机构地区：[1]南京大学物理系,南京210093 [2]南京大学固体微结构物理国家重点实验室

出　　处：《物理学报》2007年第4期2347-2352,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10575051)资助的课题.~~

摘　　要：采用电弧熔炼法制备了金属间化合物PrMn6Sn6.X射线衍射表明该化合物具有HoFe6Sn6型(空间群为Immm)晶体结构.磁测量表明该化合物为铁磁性,居里温度为325K.在15—360K范围内测量了119Sn穆斯堡尔谱,得到了8个Sn原子晶位的转移超精细场随温度的变化,并且讨论了Mn亚晶格与Pr亚晶格的磁有序方向.The intermetallic compound PrMn6Sn6 was prepared by arc-melting and showed a HoFe6Sn6-type （group space： Immm） structure. The compound is ferromagnetic, where the Mn- and Pr-sublattices are ferromagnetically coupled, and has a Curie temperature of 325 K. The n9Sn Moessbauer spectra between 15 and 360 K were measured, and were analyzed by a simplified model according to the eight Sn crystallographic sites with different nearest-neighbors environment, and the corresponding transferred hyperfine fields and the average value dependence on temperature were obtained. The magnetic structure of the two sublattice is discussed.

关 键 词：PrMn6Sn6 穆斯堡尔谱 磁结构 

分 类 号：O482.5[理学—固体物理]