Aufsatz in einer Fachzeitschrift
Theory for the photoacoustic response to circularly polarized X-rays: How to detect magnetism by using a microphone
Details zur Publikation
Autor(inn)en: | Garcia, M.; Brouder, C.; Bennemann, K. |
Verlag: | PERGAMON-ELSEVIER SCIENCE LTD |
Publikationsjahr: | 1997 |
Zeitschrift: | Solid State Communications |
Seitenbereich: | 331-335 |
Jahrgang/Band : | 103 |
Erste Seite: | 331 |
Letzte Seite: | 335 |
Seitenumfang: | 5 |
ISSN: | 0038-1098 |
Zusammenfassung, 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.
