Structural, magnetic and electrical properties of some uranium ternary germanides: UM2Ge2 (M = Rh, Ir) and U4M7Ge6 (M = Ru, Os)
作者:B. Lloret、B. Buffat、B. Chevalier、J. Etourneau
DOI:10.1016/0304-8853(87)90236-8
日期:1987.6
Abstract The crystal structures and the physical properties of U 4 M 7 Ge 6 (M = Ru, Os) and UM 2 Ge 2 (M = Rh, Ir) have been investigated. The former crystallize in the cubic structure of U 4 Re 7 Si 6 ; U 4 Ru 7 Ge 6 orders ferromagnetically at T C ≈ 10–13 K whereas U 4 Os 7 Ge 6 remains paramagnetic down to 4.2 K. The latter whise structures derive from the tetragonal ThCr 2 Si 2 or CaBe 2 Ge 2
摘要 研究了U 4 M 7 Ge 6 (M = Ru, Os)和UM 2 Ge 2 (M = Rh, Ir)的晶体结构和物理性质。前者以U 4 Re 7 Si 6 的立方结构结晶;U 4 Ru 7 Ge 6 在 TC ≈ 10–13 K 时铁磁性有序,而 U 4 Os 7 Ge 6 在低至 4.2 K 时仍保持顺磁性。后者的结构源自四方 ThCr 2 Si 2 或 CaBe 2 Ge 2 类型,显示出有限的均匀性范围;URh 2 Ge 2 在低温下表现出密集的近藤行为;UIr 2 Ge 2 表现出多晶现象,其物理性质受其晶体结构的影响很大。