用高分辨率X射线发射光谱和自旋极化X射线吸收光谱对La(1-x)SrxMnO3进行实验研究。

Experiment investigation of La(1-x)SrxMnO3 by high-resolution X-ray emission and spin-polarized X-ray absorption spectroscopy.

作者信息

Hua Wei, Zhou Kejin, Huang Yuying, Qian Q, He Wei, Ma Sixuan, Chu Wangsheng, Hu Tiandou, Wu Ziyu

机构信息

Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, CAS, Beijing, China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2008 Jul;70(2):462-5. doi: 10.1016/j.saa.2007.11.037. Epub 2008 Jan 17.

DOI:10.1016/j.saa.2007.11.037

PMID:18319193

Abstract

Big changes in resistivity along with the changing of local structure in some oxide systems, such as high-temperature superconductors and colossal magnetoresistance system, strongly suggest the need of a systematic investigation of their local electronic and atomic structures. In this work we present the high-resolution X-ray emission spectra and the spin-polarized X-ray absorption near-edge spectroscopy (SPXANES) data at the Mn K-edge in the La(1-x)Sr(x)MnO(3). This experiment is based on a high-resolution large-acceptance crystal analyzer based on Si (111) and optimized for X-ray fluorescence spectroscopy. With a spherical bent crystal monochromator, a Mn Kbeta emission spectra with high resolution was obtained with a short collection time and SPXANES spectra of La(1-x)Sr(x)MnO(3) at room temperature were also measured at high temperature.

摘要

在一些氧化物体系中，如高温超导体系和巨磁阻体系，电阻率会随着局部结构的变化而发生重大改变，这强烈表明需要对其局部电子结构和原子结构进行系统研究。在本工作中，我们展示了La(1-x)Sr(x)MnO(3)中Mn K边的高分辨率X射线发射光谱和自旋极化X射线吸收近边光谱（SPXANES）数据。该实验基于一台基于Si (111)的高分辨率大接收角晶体分析仪，且针对X射线荧光光谱进行了优化。使用球面弯曲晶体单色仪，在短采集时间内获得了高分辨率的Mn Kβ发射光谱，并且还在高温下测量了室温下La(1-x)Sr(x)MnO(3)的SPXANES光谱。