Synthesis, Crystal Structure, and Magnetic Properties of New One-Dimensional Oxides Ca3CoRhO6 and Ca3FeRhO6
Synthesis, Crystal Structure, and Magnetic Properties of New One-Dimensional Oxides Ca3CoRhO6 and Ca3FeRhO6
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新型一维氧化物Ca3CoRhO6和Ca3FeRhO6的合成、晶体结构和磁性能
DOI：
10.1006/jssc.1999.8319
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发表时间：
1999
影响因子：
5.4
通讯作者：
K. Kosuge
中科院分区：
文献类型：
--
作者：
S. Niitaka;H. Kageyama;Masaki Kato;K. Yoshimura;K. Kosuge
合成了一维化合物Ca 3CoRhO 6和Ca 3FeRhO 6，并通过Rietveld方法对它们的结构进行了表征。两个化合物均为K4 CdCl 6型菱面体结构（空间群R3 c; Z=6; Ca 3CoRhO 6：a=9.2017（1）A，c=10.7296（1）A Ca 3FeRhO 6：a=9.1960（1）A，c=10.7861（1）A）。Ca_3CoRhO_6和Ca_3FeRhO_6的结构分别由CoO_6、FeO_6三方棱柱和RhO_6八面体组成。Ca 3CoRhO 6的磁化率在35 K时突然下降，这在Sr 3 NiIrO 6和Ca 3CoIrO 6中也观察到。Ca_3FeRhO_6是一种反铁磁体，TN=12 K。
Abstract One-dimensional compounds Ca3CoRhO6 and Ca3FeRhO6 have been newly synthesized and structurally characterized by Rietveld refinement of powder X-ray diffraction data. Both compounds are isostructural with the rhombohedral K4CdCl6-type structure (space group R 3 c; Z=6; Ca3CoRhO6: a=9.2017(1) A, c=10.7296(1) A Ca3FeRhO6: a=9.1960(1) A, c=10.7861(1) A). The structure of Ca3CoRhO6 and Ca3FeRhO6 contains one-dimensional chains consisting of alternating faced-sharing CoO6, FeO6 trigonal prisms, and RhO6 octahedra, respectively. The magnetic susceptibility of Ca3CoRhO6 exhibits an abrupt drop at 35 K, which is also observed in Sr3NiIrO6 and Ca3CoIrO6. Ca3FeRhO6 is an antiferromagnet with TN=12 K.