Journal article
Theory for the photoacoustic response to circularly polarized X-rays: How to detect magnetism by using a microphone
Publication Details
Authors: | Garcia, M.; Brouder, C.; Bennemann, K. |
Publisher: | PERGAMON-ELSEVIER SCIENCE LTD |
Publication year: | 1997 |
Journal: | Solid State Communications |
Pages range : | 331-335 |
Volume number: | 103 |
Start page: | 331 |
End page: | 335 |
Number of pages: | 5 |
ISSN: | 0038-1098 |
Abstract
We present a theory for the light-polarization dependence of the photoacoustic effect induced in solids by absorption of X-rays. The photoacoustic response to x-rays is governed by the thermalization of excited Auger electrons and photoelectrons. We show that, for magnetic systems and circular (left- and right) polarization of the incident light, the photoacoustic signal S+-((h) over bar omega) depends on magnetization and exhibits x-ray magnetic circular dichroism (XMCD). As an example for this new effect, we calculate S+-((h) over bar omega) at the L-III-edge for Gd films for different thicknesses. We predict a XMCD of similar to 3%. (C) 1997 Elsevier Science Ltd.
We present a theory for the light-polarization dependence of the photoacoustic effect induced in solids by absorption of X-rays. The photoacoustic response to x-rays is governed by the thermalization of excited Auger electrons and photoelectrons. We show that, for magnetic systems and circular (left- and right) polarization of the incident light, the photoacoustic signal S+-((h) over bar omega) depends on magnetization and exhibits x-ray magnetic circular dichroism (XMCD). As an example for this new effect, we calculate S+-((h) over bar omega) at the L-III-edge for Gd films for different thicknesses. We predict a XMCD of similar to 3%. (C) 1997 Elsevier Science Ltd.
