Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission
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Date
2018-05-01
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Mark
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AIP Publishing
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Abstract
We use time-resolved X-ray photoelectron spectroscopy to probe the electronic and
magnetization dynamics in FeRh films after ultrafast laser excitations. We present
experimental and theoretical results which investigate the electronic structure of FeRh
during the first-order phase transition, identifying a clear signature of the magnetic
phase.We find that a spin polarized feature at the Fermi edge is a fingerprint of the magnetic
status of the system that is independent of the long-range ferromagnetic alignment
of the magnetic domains.We use this feature to follow the phase transition induced by a
laser pulse in a pump-probe experiment and find that the magnetic transition occurs in
less than 50 ps and reaches its maximum in 100 ps.
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Structural Dynamics. 2018, vol. 5, issue 3, p. 034501-1-034501-11.
http://dx.doi.org/10.1063/1.5027809
http://dx.doi.org/10.1063/1.5027809
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Peer-reviewed
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en