Magnetic and neutron diffraction study on the ordered perovskite Sr2HoRuO6
Magnetic and neutron diffraction study on the ordered perovskite Sr2HoRuO6
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有序钙钛矿Sr2HoRuO6的磁和中子衍射研究
DOI：
10.1039/a909096g
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发表时间：
2000
影响因子：
--
通讯作者：
Y. Morii
中科院分区：
文献类型：
--
作者：
Y. Doi;Y. Hinatsu;K. Oikawa;Y. Shimojo;Y. Morii
报道了有序钙钛矿化合物Sr_2HoRuO_6的磁性。在10 K，25 K和室温下的粉末中子衍射测量进行了研究Sr 2 HoRuO 6的晶体和磁性结构。作为在室温下收集的数据的细化的结果，发现该化合物的晶体结构是畸变的钙钛矿[a = 5.7710（3）A，B = 5.7801（3）A，c = 8.1640（4）A，β = 90.200（3）°]，空间群为P21/n，六配位B上Ru ~（5+）和Ho ~（3+）按1∶1有序排列。在10和25 K收集的数据表明，Sr 2 HoRuO 6具有长程反铁磁有序涉及Ru 5+和Ho 3+。磁矩的方向是沿着c轴。这些顺序中的每一个在I型排列中，并且这些磁矩在ab平面中彼此反平行。从5到300 K的磁化率测量结果表明，在36 K和零场和低于这个温度的场冷却条件之间的分歧存在的磁性转变。的磁场依赖性的磁化强度进行了测量和一个小的磁滞回线被发现低于发散温度，表明存在一个弱的铁磁矩与反铁磁性。
Magnetic properties of an ordered perovskite compound Sr2HoRuO6 have been reported. Powder neutron diffraction measurements at 10 K, 25 K and room temperature were performed to investigate the crystal and magnetic structures of Sr2HoRuO6. As a result of the refinement of the data collected at room temperature, it was found that the crystal structure of this compound is a distorted perovskite [a = 5.7710(3) A, b = 5.7801(3) A, c = 8.1640(4) A and β = 90.200(3)°] with space group P21/n and a 1∶1 ordered arrangement of Ru5+ and Ho3+ over the six-coordinate B sites. Data collected at 10 and 25 K show that Sr2HoRuO6 has a long range antiferromagnetic ordering involving both Ru5+ and Ho3+. The direction of the magnetic moments is along the c-axis. Each of these orders in a type I arrangement and these magnetic moments are antiparallel in the ab-plane with each other. Magnetic susceptibility measurements from 5 to 300 K showed the existence of a magnetic transition at 36 K and divergence between zero-field and field cooled conditions below this temperature. The field-dependence of the magnetization was measured and a small magnetic hysteresis loop was found below the divergence temperature indicating the existence of a weak ferromagnetic moment associated with the antiferromagnetism.