X-ray magnetic circular dichroism with tunable polarization helicity

被引：2
作者：
Varga, L
Giles, C
Zheng, YL
Pizzini, S
de Bergevin, F
Fontaine, A
Malgrange, C
机构：
[1] Univ Paris 06, Associe CNRS, Lab Mineral Cristallog, F-75252 Paris 05, France
[2] Univ Paris 07, Associe CNRS, Lab Mineral Cristallog, F-75252 Paris, France
[3] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
[4] CNRS, Lab Louis Neel, F-38042 Grenoble, France
[5] CNRS, Cristallog Lab, F-38042 Grenoble, France
来源：
JOURNAL OF SYNCHROTRON RADIATION | 1999年 / 6卷
关键词：
X-ray magnetic circular dichroism; X-ray phase plates; X-ray polarization;
D O I：
10.1107/S0909049599011267
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
X-ray magnetic circular dichroism spectra have previously been obtained by switching the polarization helicity with a diamond quarter-wave plate (QWP) and keeping the applied magnetic field on the sample as an independent variable [Giles, Malgrange, Goulon, de Bergevin, Vettier, Fontaine, Dartyge & Pizzini (1994). Nucl. Instrum, Methods, A349, 622-625]. These results were obtained by subtracting an undesirable non-magnetic residual spectrum. Experiments reported here show that this residual spectrum mainly originates from a slight lateral displacement of the forward-diffracted beam in the QWP. A quantitative analysis of the phenomenon is in good agreement with predictions from X-ray dynamical theory.
引用
收藏
页码：1125 / 1132
页数：8
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