Synchrotron x-ray-diffraction study of orbital ordering in YVO 3
Synchrotron x-ray-diffraction study of orbital ordering in YVO 3
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YVO 3 轨道排序的同步加速器 X 射线衍射研究
DOI：
10.1103/physrevb.62.r9271
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发表时间：
2000
影响因子：
3.7
通讯作者：
Y. Murakami
中科院分区：
文献类型：
--
作者：
M. Noguchi;A. Nakazawa;S. Oka;T. Arima;Y. Wakabayashi;H. Nakao;Y. Murakami
同步加速器 X 射线衍射实验已在钙钛矿型氧化钒 ${\mathrm{YVO}}_{3}$ 中进行，以阐明系统的轨道有序性。强烈建议在较低的磁转变温度下从 C 型轨道排序变为 G 型轨道排序。长程轨道有序也出现在高温顺磁相中。轨道超晶格反射的方位角依赖性表明，对于两个轨道有序相位，轨道占据大约为两个子晶格中的 ${d}_{\mathrm{xy}}^{1}{d}_{\mathrm{yz}}^{1}$ 和 ${d}_{\mathrm{xy}}^{1}{d}_{\mathrm{zx}}^{1}$ 配置，分别。这些结果与理论预测非常吻合。
Synchrotron x-ray-diffraction experiments have been carried out in a perovskite-type vanadium oxide ${\mathrm{YVO}}_{3}$ to elucidate orbital ordering of the system. The change from C- to G-type orbital ordering at the lower magnetic transition temperature was strongly suggested. The long-range orbital ordering appears also in the high-temperature paramagnetic phase. Azimuthal-angle dependence of orbital superlattice reflections indicates that for both orbital-ordering phases the orbital occupation is approximately the ${d}_{\mathrm{xy}}^{1}{d}_{\mathrm{yz}}^{1}$ and ${d}_{\mathrm{xy}}^{1}{d}_{\mathrm{zx}}^{1}$ configuration in two sublattices, respectively. These results are in good agreement with a theoretical prediction.