Artículos de revistas
X-ray magnetic circular dichroism with tunable polarization helicity
Registro en:
Journal Of Synchrotron Radiation. Munksgaard Int Publ Ltd, v. 6, n. 1125, n. 1132, 1999.
0909-0495
WOS:000083648800009
10.1107/S0909049599011267
Autor
Varga, L
Giles, C
Zheng, YL
Pizzini, S
de Bergevin, F
Fontaine, A
Malgrange, C
Institución
Resumen
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. 6 6 1125 1132