Physical Properties of Double Perovskite-type Barium Neodymium Osmate Ba2NdOsO6
Physical Properties of Double Perovskite-type Barium Neodymium Osmate Ba2NdOsO6
复制标题
双钙钛矿型锇酸钡钡Ba2NdOsO6的物理性质
DOI：
10.1016/j.jssc.2012.08.059
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Y. Hinatsu and K. Ohoyama
中科院分区：
文献类型：
--
作者：
M. Wakeshima;Y. Hinatsu and K. Ohoyama
通过粉末X射线和中子衍射、电导率、磁化率和比热测量研究了双钙钛矿型锇酸钡锇Ba2NdOsO6的晶体、磁性结构和物理性质。 Rietveld 分析表明，Nd 和 Os 离子在扭曲的钙钛矿 ABO3 框架中的六配位 B 位点上有规律地排列。随着温度从 300K 降至 2.5K，空间群 P21/n（倾斜系统 a−a−c+）描述的单斜晶体结构变得更加扭曲。该化合物在低于 65K 的温度下显示出 Os5+ 的长程反铁磁有序性。 Nd3+ 的反铁磁有序化也会在较低温度 (∼20K) 下发生。磁结构为I型，Nd3+和Os5+离子的磁矩在ab平面上方向相同。
The crystal, magnetic structures and physical properties of the double perovskite-type barium neodymium osmate Ba2NdOsO6are investigated through powder X-ray and neutron diffraction, electrical conductivity, magnetic susceptibility, and specific heat measurements. The Rietveld analysis reveals that the Nd and Os ions are arranged with regularity over the six-coordinate B sites in a distorted perovskite ABO3framework. The monoclinic crystal structure described by space group P21/n (tilt system a−a−c+) becomes more distorted with decreasing temperature from 300K down to 2.5K. This compound shows a long-range antiferromagnetic ordering of Os5+below 65K. An antiferromagnetic ordering of Nd3+also occurs at lower temperatures (∼20K). The magnetic structure is of Type I and the magnetic moments of Nd3+and Os5+ions are in the same direction in the ab-plane.