The crystal and magnetic structures of Ca2NdRuO6, Ca2HoRuO6, and Sr2ErRuO6
The crystal and magnetic structures of Ca2NdRuO6, Ca2HoRuO6, and Sr2ErRuO6
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Ca2NdRuO6、Ca2HoRuO6 和 Sr2ErRuO6 的晶体和磁性结构
DOI：
10.1016/0022-4596(91)90147-a
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发表时间：
1991
影响因子：
3.3
通讯作者：
F. Studer
中科院分区：
文献类型：
--
作者：
P. Battle;C. Jones;F. Studer
利用室温中子粉末衍射数据对Sr2 ErRuO6晶体结构进行了修正，空间群为P2 1n，a= 5.7626（2），B= 5.7681（2），c= 8.1489（2）°，β= 90.19（1）°.其结构为畸变钙钛矿结构，Ru 5+和Er 3+在六配位上以1：1的比例有序排列。在4.2 K下收集的数据表明，存在的长程反铁磁秩序涉及Ru 5+和Er 3+。描述了亚晶格磁化强度的温度依赖性。Ca 2 NdRuO 6的晶体结构也是畸变钙钛矿的晶体结构（P2 1 n，a= 5.5564（1），B= 5.8296（1），c= 8.0085（1）β= 90.19（1）°。β= 90.07（1）°），Ca2+和Nd3+在A位无规分布，Ca2+和Ru5+在六配位B位呈1：1有序排列. Ru 5+亚晶格在4.2K下是反铁磁的，但没有证据表明Nd 3+离子的磁有序性. Ca 2 HoRuO 6也是一种畸变钙钛矿（P2 1 n，a= 5.4991（1），B= 5.7725（1），c= 7.9381（2），β= 90.18（1）°，4.2 K），其阳离子分布最佳表示为Ca 1.46 Ho 0.54 [Ca 0.54 Ho 0.46 Ru] O 6。在A和B晶位上，Ca 3+和Ho 3+离子之间没有有序排列，但在B晶位上，Ca Ho离子与Ru 5+离子形成1：1的有序排列.在4.2K时，Ru 5+离子呈I型反铁磁排列，但Ho 3+离子间没有长程磁有序.
The crystal structure of Sr 2 ErRuO 6 has been refined from neutron powder diffraction data collected at room temperature; space group P2 1 n, a= 5.7626 (2), b= 5.7681 (2), c= 8.1489 (2) Å, β= 90.19 (1)°. The structure is that of a distorted perovskite with a 1: 1 ordered arrangement of Ru 5+ and Er 3+ over the 6-coordinate sites. Data collected at 4.2 K show the presence of long range antiferromagnetic order involving both Ru 5+ and Er 3+. The temperature dependence of the sublattice magnetizations is described. The crystal structure of Ca 2 NdRuO 6 is also that of a distored perovskite (P2 1 n, a= 5.5564 (1), b= 5.8296 (1), c= 8.0085 (1) β= 90.19 (1)°. The β= 90.07 (1)°) with a random distribution of Ca 2+ and Nd 3+ on the A site and a 1: 1 ordered arrangement of Ca 2+ and Ru 5+ on the 6-coordinate B sites. The Ru 5+ sublattice is antiferromagnetic at 4.2 K but there is no evidence for magnetic ordering of the Nd 3+ ions. Ca 2 HoRuO 6 is also a distorted perovskite (P2 1 n, a= 5.4991 (1), b= 5.7725 (1), c= 7.9381 (2), β= 90.18 (1)° at 4.2 K) with a cation distribution best represented as Ca 1.46 Ho 0.54 [Ca 0.54 Ho 0.46 Ru] O 6. There is no ordering among the Ca 3+ or Ho 3+ ions on either the A or the B sites, but the Ca Ho ions form a 1: 1 ordered arrangement with Ru 5+ on the B sites. At 4.2 K the Ru 5+ ions adopt a Type I antiferromagnetic arrangement but there is no evidence of long range magnetic ordering among the Ho 3+ ions.