Element-specific spin and orbital momentum dynamics of Fe/Gdmultilayers

The role of orbital magnetism in the laser-induced demagnetization of Fe/Gd multilayers was investigated using time-resolved X-ray magnetic circular dichroism at 2-ps time resolution given by an x-ray streak camera. An ultrafast transfer of angular momentum from the spin via the orbital momentum to...

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Published in:Applied physics letters 2007-03, Vol.90
Main Authors: Bartelt, A.F., Comin, A., Feng, J., Nasiatka, J.R., Eimuller, T., Ludescher, B., Schutz, G., Padmore, H.A., Young, A.T., Scholl, A.
Format: Article
Language:English
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36
advanced light source als
ANGULAR MOMENTUM
DEMAGNETIZATION
MAGNETIC CIRCULAR DICHROISM
MAGNETISM
SPIN
STREAK CAMERAS
TIME RESOLUTION
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container_title Applied physics letters
container_volume 90
creator Bartelt, A.F.
Comin, A.
Feng, J.
Nasiatka, J.R.
Eimuller, T.
Ludescher, B.
Schutz, G.
Padmore, H.A.
Young, A.T.
Scholl, A.
description The role of orbital magnetism in the laser-induced demagnetization of Fe/Gd multilayers was investigated using time-resolved X-ray magnetic circular dichroism at 2-ps time resolution given by an x-ray streak camera. An ultrafast transfer of angular momentum from the spin via the orbital momentum to the lattice was observed which was characterized by rapidly thermalizing spin and orbital momenta. Strong interlayer exchange coupling between Fe and Gd led to a simultaneous demagnetization of both layers.
doi_str_mv 10.1063/1.2724911
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subjects 36
advanced light source als
ANGULAR MOMENTUM
DEMAGNETIZATION
MAGNETIC CIRCULAR DICHROISM
MAGNETISM
SPIN
STREAK CAMERAS
TIME RESOLUTION
title Element-specific spin and orbital momentum dynamics of Fe/Gdmultilayers
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