The BM<sub>5sub>Se<sub>9sub> phases: M枚ssbauer studies of the superconductors and the ferromagnets
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- 作者：A. Leblanc-Soreau ; J. C. Jumas and L. Aldon
- 关键词：119Sn and 121Sb M枚ssbauer spectroscopy ; M枚ssbauer temperature ; superconductor ; ferromagnet ; selenide
- 刊名：Hyperfine Interactions
- 出版时间：February, 2006
- 出版年：2006
- 期刊代码：18_03043843
- 类别：cp
- 卷：168
- 期：1-3
- 页码：1211-1215
- 数据来源：sp
摘要
Syntheses performed in the A<sub>3sub>B/MSe<sub>2sub> (A = Sb, Ga, Sn) (B = Nb, V, Ta) (M = V, Nb, Ta) systems lead to the formation of B(M/A)<sub>5sub>Se<sub>9sub> phases which could be ferromagnets or superconductors. It has been shown that the presence of V modifies the superconducting exchanges and allows ferromagnetic couplings. M枚ssbauer spectroscopy of both 121Sb and 119Sn gives local electronic structure of the SbNb<sub>5sub>Se<sub>9sub> superconductor and the Sn<sub>0.94sub>Ga<sub>0.06sub>V<sub>0.30sub>Nb<sub>4.70sub>Se<sub>9sub> ferromagnet. For the latter compound, a complete study as a function of temperature is carried out showing that the Sn environment is not modified when the ferromagnetic transition occurs. The Debye temperature is calculated and compared to those obtained for other selenide compounds.