高压下X射线磁圆二色性测量仪器。

Instrument for x-ray magnetic circular dichroism measurements at high pressures.

作者信息

Haskel D, Tseng Y C, Lang J C, Sinogeikin S

机构信息

Magnetic Materials Group, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA.

出版信息

Rev Sci Instrum. 2007 Aug;78(8):083904. doi: 10.1063/1.2773800.

DOI:10.1063/1.2773800

PMID:17764332

Abstract

An instrument has been developed for x-ray magnetic circular dichroism (XMCD) measurements at high pressures and low temperatures. This instrument couples a nonmagnetic copper-beryllium diamond anvil cell featuring perforated diamonds with a helium flow cryostat and an electromagnet. The applied pressure can be controlled in situ using a gas membrane and calibrated using Cu K-edge x-ray absorption fine structure measurements. The performance of this instrument was tested by measuring the XMCD spectra of the Gd(5)Si(2)Ge(2) giant magnetocaloric material.

摘要

一种用于在高压和低温下进行X射线磁圆二色性（XMCD）测量的仪器已被开发出来。该仪器将一个带有穿孔金刚石的非磁性铜铍金刚石对顶砧室与一个氦流低温恒温器和一个电磁铁相结合。施加的压力可以通过气体膜进行原位控制，并使用Cu K边X射线吸收精细结构测量进行校准。通过测量Gd(5)Si(2)Ge(2)巨磁热材料的XMCD光谱对该仪器的性能进行了测试。