MAGNETIC-SUSCEPTIBILITY AND ELECTRON-PARAMAGNETIC RESONANCE STUDIES OF TETRAVALENT TERBIUM IONS IN BATBO3 AND SRTBO3

被引：23

作者：

HINATSU, Y

机构：

[1] Department of Chemistry, Japan Atomic Energy Research Institute, Ibaraki, 319-11, Tokai-mura

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1992年 / 100卷 / 01期

关键词：

D O I：

10.1016/0022-4596(92)90163-P

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Tetravalent terbium perovskites, BaTbO3 and SrTbO3, were prepared, and their magnetic susceptibilities and electron paramagnetic resonance (EPR) spectra were measured. Both the compounds showed antiferromagnetic transitions at 32.7 and 30.5 K, respectively. The effective magnetic moment of terbium is 7.96 μB, which is very close to the theoretical value of the Tb4+ ion. The EPR spectra could be measured at room temperature. The spectra were broad and the g-values of BaTbO3 and SrTbO3 were 2.00 and 1.97, respectively. These results also show that the oxidation state of terbium is not trivalent, but tetravalent. The deviation of the g-value from 2.00 for SrTbO3 is due to the large crystal field distortion from octahedral symmetry around the terbium ion. © 1992.

引用

页码：136 / 140

页数：5

共 13 条

[1]

Abragam A., 1970, ELECT PARAMAGNETIC R

[2] CRYSTALLOGRAPHIC STUDIES OF PEROVSKITE-LIKE COMPOUNDS .1. RARE EARTH ORTHOFERRITES AND YFEO3, YCRO3, YALO3 [J].