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

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.2724911· OSTI ID:929756

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.

Research Organization:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US); Advanced Light Source(ALS)
Sponsoring Organization:
USDOE Director. Office of Science. Basic EnergySciences
DOE Contract Number:
AC02-05CH11231
OSTI ID:
929756
Report Number(s):
LBNL--60776; BnR: KC0204016
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Vol. 90; ISSN APPLAB; ISSN 0003-6951
Country of Publication:
United States
Language:
English

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