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Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission

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, identi...

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Autores principales: Pressacco, Federico, Uhlíř, Vojtěch, Gatti, Matteo, Nicolaou, Alessandro, Bendounan, Azzedine, Arregi, Jon Ander, Patel, Sheena K. K., Fullerton, Eric E., Krizmancic, Damjan, Sirotti, Fausto
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Crystallographic Association 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5966309/
https://www.ncbi.nlm.nih.gov/pubmed/29888296
http://dx.doi.org/10.1063/1.5027809
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author Pressacco, Federico
Uhlíř, Vojtěch
Gatti, Matteo
Nicolaou, Alessandro
Bendounan, Azzedine
Arregi, Jon Ander
Patel, Sheena K. K.
Fullerton, Eric E.
Krizmancic, Damjan
Sirotti, Fausto
author_facet Pressacco, Federico
Uhlíř, Vojtěch
Gatti, Matteo
Nicolaou, Alessandro
Bendounan, Azzedine
Arregi, Jon Ander
Patel, Sheena K. K.
Fullerton, Eric E.
Krizmancic, Damjan
Sirotti, Fausto
author_sort Pressacco, Federico
collection PubMed
description 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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spelling pubmed-59663092018-06-10 Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission Pressacco, Federico Uhlíř, Vojtěch Gatti, Matteo Nicolaou, Alessandro Bendounan, Azzedine Arregi, Jon Ander Patel, Sheena K. K. Fullerton, Eric E. Krizmancic, Damjan Sirotti, Fausto Struct Dyn Articles 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. American Crystallographic Association 2018-05-23 /pmc/articles/PMC5966309/ /pubmed/29888296 http://dx.doi.org/10.1063/1.5027809 Text en © 2018 Author(s). 2329-7778/2018/5(3)/034501/11 All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Articles
Pressacco, Federico
Uhlíř, Vojtěch
Gatti, Matteo
Nicolaou, Alessandro
Bendounan, Azzedine
Arregi, Jon Ander
Patel, Sheena K. K.
Fullerton, Eric E.
Krizmancic, Damjan
Sirotti, Fausto
Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission
title Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission
title_full Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission
title_fullStr Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission
title_full_unstemmed Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission
title_short Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission
title_sort laser induced phase transition in epitaxial ferh layers studied by pump-probe valence band photoemission
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5966309/
https://www.ncbi.nlm.nih.gov/pubmed/29888296
http://dx.doi.org/10.1063/1.5027809
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