Magnetic and electrical properties of the equiatomic cerium germanides CeMGe (M = Rh, Ir, Pd, Pt)
Magnetic and electrical properties of the equiatomic cerium germanides CeMGe (M = Rh, Ir, Pd, Pt)
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等原子锗化铈 CeMGe (M = Rh、Ir、Pd、Pt) 的磁和电特性
DOI：
10.1016/0304-8853(89)90134-0
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发表时间：
1989
影响因子：
2.7
通讯作者：
J. Etourneau
中科院分区：
文献类型：
--
作者：
P. Rogl;B. Chevalier;M. Besnus;J. Etourneau
根据X射线Guinier粉末数据，证实三元锗化物Ce(Rh或Ir)Ge和Ce(Pd或Pt)Ge的晶体结构分别为TiNiSi型和CeCu2型。这些材料的磁性、电学和热力学性质已在 1.5 K ⩽T⩽ 300 K 的温度范围内进行了研究。CeRhGe 在 9.3 K 以下呈反铁磁性有序，而在 CeIrGe 中，铈处于中间价态，在低至 1.5 K 的温度下没有观察到磁转变。电阻率和比热测量表明，CePdGe 和 CePtGe 都在 3.4 K 附近出现磁转变。根据目前的研究，化合物 CeMGe（M = Rh、Pd、Pt）被归类为磁有序近藤系统。
From X-ray Guinier powder data the crystal structures of the ternary germanides Ce(Rh or Ir)Ge and Ce(Pd or Pt)Ge were confirmed to be of the TiNiSi-type and the CeCu2-type, respectively. Magnetic, electrical and thermodynamic properties of these materials have been studied in the temperature range 1.5 K ⩽T⩽ 300 K. CeRhGe orders antiferromagnetically below 9.3 K, whereas in CeIrGe cerium is in an intermediate valence state and no magnetic transition is observed down to 1.5 K. Resistivity and specific heat measurements reveal a magnetic transition near 3.4 K for both CePdGe and CePtGe. According to the present investigations the compounds CeMGe, with M = Rh, Pd, Pt are classified as magnetically ordered Kondo systems.