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Title: Revealing the Nature of the Ultrafast Magnetic Phase Transition in Ni by Correlating Extreme Ultraviolet Magneto-Optic and Photoemission Spectroscopies

Journal Article · · Physical Review Letters
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  1. Univ. of Colorado, Boulder, CO (United States). JILA; National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
  2. National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
  3. Uppsala Univ. (Sweden)

By correlating time- and angle-resolved photoemission and time-resolved transverse- magnetooptical Kerr effect measurements, both at extreme ultraviolet wavelengths, we uncover the universal 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. In this work, both probe methods exhibit the same demagnetization and recovery timescales. The spin system absorbs the energy required to proceed through a magnetic phase transition within 20 fs after the peak of the pump pulse. However, the spectroscopic signatures of demagnetization of the material appear only after ≈ 200 fs, and subsequent recovery of the magnetization on timescales ranging from 500 fs to >70 ps. We also provide evidence of two competing channels with two distinct timescales in the recovery process, that suggest the presence of coexisting phases in the material.

Research Organization:
Univ. of Colorado, Boulder, CO (United States). JILA
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Gordon and Betty Moore Foundation; Swedish Research Council (VR); Wallenberg Foundation: European Union; KMLabs
Grant/Contract Number:
SC0002002; GBMF4538; 2015.0060; 737709
OSTI ID:
1673434
Alternate ID(s):
OSTI ID: 1464870; OSTI ID: 1957808
Journal Information:
Physical Review Letters, Vol. 121, Issue 7; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

References (49)

Ultrafast non-thermal control of magnetization by instantaneous photomagnetic pulses journal May 2005
Driving force of ultrafast magnetization dynamics journal December 2011
Laser-Induced Ultrafast Demagnetization in Ferromagnetic Metals journal October 2000
Aimantation et phénomène magnétocalorique du nickel journal January 1926
Femtosecond Electron and Spin Dynamics in N i / W ( 110 ) Films journal June 2003
Critical behavior within 20 fs drives the out-of-equilibrium laser-induced magnetic phase transition in nickel journal March 2018
Magneto-optical sensitivity functions of thin-film systems journal June 1993
Direct time-domain observation of attosecond final-state lifetimes in photoemission from solids journal June 2016
Ultrafast magnetization enhancement in metallic multilayers driven by superdiffusive spin current journal January 2012
Many-Body Theory of Ultrafast Demagnetization and Angular Momentum Transfer in Ferromagnetic Transition Metals journal November 2015
Distinguishing the ultrafast dynamics of spin and orbital moments in solids journal May 2010
The influence of the excitation pulse length on ultrafast magnetization dynamics in nickel text January 2015
Super-Diffusive Spin-Transport as a Mechanism of Ultrafast Demagnetization text January 2011
Ultrafast demagnetization of metals: Collapsed exchange versus collective excitations journal May 2015
Ultrafast Demagnetization Dynamics at the M Edges of Magnetic Elements Observed Using a Tabletop High-Harmonic Soft X-Ray Source journal December 2009
Unifying Ultrafast Magnetization Dynamics journal December 2005
Slow recovery of the magnetisation after a sub-picosecond heat pulse journal December 2007
Probing the timescale of the exchange interaction in a ferromagnetic alloy journal March 2012
Femtosecond modification of electron localization and transfer of angular momentum in nickel journal August 2007
Ultrafast demagnetization of ferromagnetic transition metals: The role of the Coulomb interaction journal November 2009
Magnetic Damping in Ferromagnetic Thin Films journal May 2006
All-optical control of ferromagnetic thin films and nanostructures journal August 2014
Superdiffusive Spin Transport as a Mechanism of Ultrafast Demagnetization journal July 2010
Coherent ultrafast magnetism induced by femtosecond laser pulses journal May 2009
Ultrafast demagnetization of ferromagnetic transition metals: The role of the Coulomb interaction text January 2009
Nanoscale spin reversal by non-local angular momentum transfer following ultrafast laser excitation in ferrimagnetic GdFeCo journal March 2013
Many-body theory of ultrafast demagnetization and angular momentum transfer in ferromagnetic transition metals text January 2015
Aimantation et phénomène magnétocalorique du nickel journal January 1925
Ultrafast Spin Dynamics in Ferromagnetic Nickel journal May 1996
Physical contributions to the heat capacity of nickel journal January 1981
Ultrafast Formation of a Charge Density Wave State in 1 T TaS 2 : Observation at Nanometer Scales Using Time-Resolved X-Ray Diffraction journal June 2017
Driving Force of Ultrafast Magnetization Dynamics preprint January 2011
Nanoscale spin reversal by non-local angular momentum transfer following ultrafast laser excitation in ferrimagnetic GdFeCo text January 2013
Feedback Effect during Ultrafast Demagnetization Dynamics in Ferromagnets journal October 2013
Computer experiments on the information depth and the figure of merit in magnetooptics journal May 1992
Explaining the paradoxical diversity of ultrafast laser-induced demagnetization journal December 2009
Ultrafast spin transport as key to femtosecond demagnetization journal January 2013
Femtosecond Laser Excitation Drives Ferromagnetic Gadolinium out of Magnetic Equilibrium journal July 2012
Ultrafast Magnon Generation in an Fe Film on Cu(100) journal November 2010
Stoner versus Heisenberg: Ultrafast exchange reduction and magnon generation during laser-induced demagnetization journal December 2016
The influence of the excitation pulse length on ultrafast magnetization dynamics in nickel journal March 2015
Band structure evolution during the ultrafast ferromagnetic-paramagnetic phase transition in cobalt journal March 2017
Temperature Dependence of Laser-Induced Demagnetization in Ni: A Key for Identifying the Underlying Mechanism journal May 2012
Quantum Theory of Magnetism book January 2009
Faraday rotation spectra at shallow core levels: 3 p edges of Fe, Co, and Ni journal October 2006
Direct measurement of the static and transient magneto-optical permittivity of cobalt across the entire M -edge in reflection geometry by use of polarization scanning journal January 2018
All-optical control of ferromagnetic thin films and nanostructures text January 2014
Controlling the Competition between Optically Induced Ultrafast Spin-Flip Scattering and Spin Transport in Magnetic Multilayers journal May 2013
Decoupling of Structural and Electronic Phase Transitions in VO 2 journal October 2012

Cited By (4)

Ultrafast dynamics of 4f electron spins in TbFeCo film driven by inter-atomic 3d–5d–4f exchange coupling journal December 2019
Femtosecond X-ray induced changes of the electronic and magnetic response of solids from electron redistribution journal November 2019
udkm1Dsim – a Python toolbox for simulating 1D ultrafast dynamics in condensed matter journal September 2021
Time-Resolved XUV absorption spectroscopy and magnetic circular dichroism at the Ni $M_{2,3}$-edges text January 2020

Figures / Tables (5)