Magnetic and calorimetric studies on ordered perovskite Ba2ErRuO6
Magnetic and calorimetric studies on ordered perovskite Ba2ErRuO6
复制标题
有序钙钛矿 Ba2ErRuO6 的磁学和量热研究
DOI：
10.1016/s0022-4596(02)00041-5
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发表时间：
2002
影响因子：
3.3
通讯作者：
Y. Ishii
中科院分区：
文献类型：
--
作者：
Y. Izumiyama;Y. Doi;M. Wakeshima;Y. Hinatsu;A. Nakamura;Y. Ishii
报道了有序钙钛矿型化合物Ba_2ErRuO_6的磁性。我们在10 K和室温下进行了粉末中子衍射测量，以研究其晶体和磁性结构。对室温下收集的数据进行了精修，结果表明该化合物的晶体结构为立方钙钛矿结构（a= 8.323（1）A），空间群为Fm 3 <$m，Er ~（3+）和Ru ~（5+）在六配位B上按1：1的比例有序排列。从磁化率和比热测量，该化合物在10和40 K显示两个磁异常。对磁比热随温度变化的分析表明，在40 K处的反常是由于Ru ~（5+）离子的反铁磁有序，而在10 K处的反常是由于Er ~（3+）离子间的磁相互作用。在10 K下收集的中子衍射数据表明，Ba 2 ErRuO 6具有涉及Er 3+和Ru 5+的长程铁磁有序。它们的磁矩都按I型排列，并且这些磁矩在ab平面内相互反平行。
Magnetic properties of an ordered perovskite compound Ba2ErRuO6have been reported. We have performed powder neutron diffraction measurements at 10K and room temperature to investigate its crystal and magnetic structures. As a result of the refinement of the data collected at room temperature, it has been found that the crystal structure of this compound is a cubic perovskite (a= 8.323(1) A ̊ ) with the space group Fm 3 ̄ m and the 1:1 ordered arrangement of Er3+and Ru5+over the six-coordinate B sites. From the magnetic susceptibility and specific heat measurements, this compound shows two magnetic anomalies at 10 and 40K. The analysis of the temperature dependence of the magnetic specific heat indicates that the anomaly at 40K is due to the antiferromagnetic ordering of Ru5+ions and the anomaly at 10K is ascribable to the magnetic interactions between Er3+ions. Neutron diffraction data collected at 10K show that the Ba2ErRuO6has a long-range ferromagnetic ordering involving both Er3+and Ru5+. Each of their magnetic moments orders in a Type I arrangement and these magnetic moments are antiparallel in the ab-plane with each other.