Local magnetic ordering in La1−xCaxMnO3 determined by spin-polarized x-ray absorption spectroscopy
Local magnetic ordering in La1−xCaxMnO3 determined by spin-polarized x-ray absorption spectroscopy
复制标题
自旋偏振 X 射线吸收光谱测定 La1−xCaxMnO3 中的局域磁序
DOI：
10.1063/1.1473700
复制
发表时间：
2002
影响因子：
4
通讯作者：
A. Ignatov
中科院分区：
文献类型：
--
作者：
Q. Qian;T. Tyson;C. Kao;M. Croft;A. Ignatov
系统研究了La1−xCaxMnO3的自旋相关Mn K边X射线吸收谱。通过研究边前谱随温度的变化，建立了一个激发过程的模型，并用于预测Mn位的局部磁有序随温度的变化。该方法对钙钛矿体系具有普遍适用性。它可以用来确定局部磁序（铁磁与反铁磁）的变化后，通过过渡金属网站或外部扰动的结果。
A systematic study of spin-dependent Mn K-edge x-ray absorption spectra was performed on La1−xCaxMnO3. By examining the changes in the pre-edge spectra with the temperature, a model of the excitation process is developed and used to predict the temperature dependent changes in the local magnetic ordering about Mn sites. The approach is of general applicability to perovskite systems. It can be used to determine the change in the local magnetic order (ferromagnetic versus antiferromagnetic) about a transition metal site upon going through a transition or as the result of external perturbations.