The nature of the ultrafast magnetic phase transition in nickel revealed by correlating EUV-MOKE and ARPES spectroscopies

The nature of the ultrafast magnetic phase transition in nickel revealed by correlating EUV-MOKE and ARPES spectroscopies

By correlating time- and angle-resolved photoemission (Tr-ARPES) and time-resolved transverse- magneto-optical Kerr effect (Tr-TMOKE) measurements, both at extreme ultraviolet (EUV) wavelengths, we uncover the nature of the ultrafast photoinduced magnetic phase transition in Ni. This allows us to ex...

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Main Authors: Tao Zhensheng, You Wenjing, Tengdin Phoebe, Chen Cong, Shi Xun, Zusin Dmitriy, Zhang Yingchao, Gentry Christian, Blonsky Adam, Keller Mark, Openeer Peter, Kapteyn Henry, Murnane Margaret
Format: Article
Language:English
Published: EDP Sciences 2019-01-01
Series:EPJ Web of Conferences
Online Access:https://www.epj-conferences.org/articles/epjconf/pdf/2019/10/epjconf_up2019_04002.pdf
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spelling doaj-e2b63dbb69c342668f2369180806c95b2021-08-02T09:02:13ZengEDP SciencesEPJ Web of Conferences2100-014X2019-01-012050400210.1051/epjconf/201920504002epjconf_up2019_04002The nature of the ultrafast magnetic phase transition in nickel revealed by correlating EUV-MOKE and ARPES spectroscopiesTao ZhenshengYou Wenjing0Tengdin Phoebe1Chen Cong2Shi Xun3Zusin Dmitriy4Zhang Yingchao5Gentry Christian6Blonsky Adam7Keller Mark8Openeer Peter9Kapteyn Henry10Murnane Margaret11Department of Physics and JILA, University of Colorado and NISTDepartment of Physics and JILA, University of Colorado and NISTDepartment of Physics and JILA, University of Colorado and NISTDepartment of Physics and JILA, University of Colorado and NISTDepartment of Physics and JILA, University of Colorado and NISTDepartment of Physics and JILA, University of Colorado and NISTDepartment of Physics and JILA, University of Colorado and NISTDepartment of Physics and JILA, University of Colorado and NISTNational Institute of Standards and Technology (NIST)Department of Physics and Astronomy, Uppsala UniversityDepartment of Physics and JILA, University of Colorado and NISTDepartment of Physics and JILA, University of Colorado and NISTBy correlating time- and angle-resolved photoemission (Tr-ARPES) and time-resolved transverse- magneto-optical Kerr effect (Tr-TMOKE) measurements, both at extreme ultraviolet (EUV) wavelengths, we uncover the nature of the ultrafast photoinduced magnetic phase transition in Ni. This allows us to explain the ultrafast magnetic response of Ni at all laser fluences - from a small reduction of the magnetization at low laser fluences, to complete quenching at high laser fluences. We provide an alternative explanation to the fluence-dependent recovery timescales commonly observed in ultrafast magneto-optical spectroscopies on ferromagnets: it is due to the bulk-averaging effect and different depths of sample exhibit distinct dynamics, depending on whether a magnetic phase transition is induced. We also show evidence of two competing channels with two distinct timescales in the recovery process, that suggest the presence of coexisting phases in the material.https://www.epj-conferences.org/articles/epjconf/pdf/2019/10/epjconf_up2019_04002.pdf
collection DOAJ
language English
format Article
sources DOAJ
author Tao Zhensheng
You Wenjing
Tengdin Phoebe
Chen Cong
Shi Xun
Zusin Dmitriy
Zhang Yingchao
Gentry Christian
Blonsky Adam
Keller Mark
Openeer Peter
Kapteyn Henry
Murnane Margaret
spellingShingle Tao Zhensheng
You Wenjing
Tengdin Phoebe
Chen Cong
Shi Xun
Zusin Dmitriy
Zhang Yingchao
Gentry Christian
Blonsky Adam
Keller Mark
Openeer Peter
Kapteyn Henry
Murnane Margaret
The nature of the ultrafast magnetic phase transition in nickel revealed by correlating EUV-MOKE and ARPES spectroscopies
EPJ Web of Conferences
author_facet Tao Zhensheng
You Wenjing
Tengdin Phoebe
Chen Cong
Shi Xun
Zusin Dmitriy
Zhang Yingchao
Gentry Christian
Blonsky Adam
Keller Mark
Openeer Peter
Kapteyn Henry
Murnane Margaret
author_sort Tao Zhensheng
title The nature of the ultrafast magnetic phase transition in nickel revealed by correlating EUV-MOKE and ARPES spectroscopies
title_short The nature of the ultrafast magnetic phase transition in nickel revealed by correlating EUV-MOKE and ARPES spectroscopies
title_full The nature of the ultrafast magnetic phase transition in nickel revealed by correlating EUV-MOKE and ARPES spectroscopies
title_fullStr The nature of the ultrafast magnetic phase transition in nickel revealed by correlating EUV-MOKE and ARPES spectroscopies
title_full_unstemmed The nature of the ultrafast magnetic phase transition in nickel revealed by correlating EUV-MOKE and ARPES spectroscopies
title_sort nature of the ultrafast magnetic phase transition in nickel revealed by correlating euv-moke and arpes spectroscopies
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2019-01-01
description By correlating time- and angle-resolved photoemission (Tr-ARPES) and time-resolved transverse- magneto-optical Kerr effect (Tr-TMOKE) measurements, both at extreme ultraviolet (EUV) wavelengths, we uncover the nature of the ultrafast photoinduced magnetic phase transition in Ni. This allows us to explain the ultrafast magnetic response of Ni at all laser fluences - from a small reduction of the magnetization at low laser fluences, to complete quenching at high laser fluences. We provide an alternative explanation to the fluence-dependent recovery timescales commonly observed in ultrafast magneto-optical spectroscopies on ferromagnets: it is due to the bulk-averaging effect and different depths of sample exhibit distinct dynamics, depending on whether a magnetic phase transition is induced. We also show evidence of two competing channels with two distinct timescales in the recovery process, that suggest the presence of coexisting phases in the material.
url https://www.epj-conferences.org/articles/epjconf/pdf/2019/10/epjconf_up2019_04002.pdf
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