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Physical Review B (Condensed Matter and Materials Physics) -- April 1, 2000 -- Volume 61, Issue 14, pp. R9221-R9224

Dynamics of surface magnetization on a nanosecond time scale

Fausto Sirotti

Laboratoire pour l'Utilisation du Rayonnement Electromagnetique, CNRS-CEA-MESR, F-91405 Orsay, France

Simone Girlando

INFM, Dipartimento di Fisica dell'Università di Modena, I-4100 Modena, Italy

Pilar Prieto

Departamento Fisica Aplicada, C-XII, Facultad de Ciencias, Universidad Autonoma de Madrid, E-28049 Cantoblanco, Spain

Luca Floreano

INFM, TASC Laboratory, Area di Ricerca, Padriciano 99, Trieste, Italy

Giancarlo Panaccione

APE Project, INFM, TASC Laboratory, Area di Ricerca, Padriciano 99, Trieste, Italy

Giorgio Rossi

INFM, Dipartimento di Fisica dell'Università di Modena, I-4100 Modena, Italy
Laboratorium für Festkörperphysik, ETH-Zürich, CH-8093 Zürich, Switzerland

(Received 5 November 1999)

The dynamics of surface magnetization is measured with ns time resolution by spin-polarimetry of the total photoemission yield excited by synchrotron radiation pulses. The surface response is compared to the bulk magnetization dynamics as obtained by induction measurements. The surface and the bulk show distinct magnetization dynamics indicating weak coupling during the reversal process in the ns-µs time domain. Ultrathin layers of Fe as well as three-layer Fe/Cu/Fe exchange coupled structures were grown on top of an amorphous soft-ferromagnetic substrate (Vitrovac) and showed different reversal dynamics. ©2000 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v61/pR9221
doi:10.1103/PhysRevB.61.R9221
PACS: 75.30.Pd        Additional Information

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