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.


Authors/Editors

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