Ultrafast electron dynamics in magnetic thin films

Hovan Lee; Cedric Weber; Manfred Fähnle; Mostafa Shalaby

doi:10.3390/app11209753

Ultrafast electron dynamics in magnetic thin films

Hovan Lee, Cedric Weber, Manfred Fähnle, Mostafa Shalaby^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

In past decades, ultrafast spin dynamics in magnetic systems have been associated with heat deposition from high energy laser pulses, limiting the selective access to spin order. Here, we use a long wavelength terahertz (THz) pump–optical probe setup to measure structural features in the ultrafast time scale. We find that complete demagnetization is possible with <6 THz pulses. This occurs concurrently with longitudinal acoustic phonons and an electronic response.

Original language	English
Article number	9753
Journal	Applied Sciences (Switzerland)
Volume	11
Issue number	20
DOIs	https://doi.org/10.3390/app11209753
Publication status	E-pub ahead of print - 19 Oct 2021

Keywords

Charge-spin dynamics
Terahertz spectroscopy
Ultrafast demagnetization

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10.3390/app11209753

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title = "Ultrafast electron dynamics in magnetic thin films",

abstract = "In past decades, ultrafast spin dynamics in magnetic systems have been associated with heat deposition from high energy laser pulses, limiting the selective access to spin order. Here, we use a long wavelength terahertz (THz) pump–optical probe setup to measure structural features in the ultrafast time scale. We find that complete demagnetization is possible with <6 THz pulses. This occurs concurrently with longitudinal acoustic phonons and an electronic response.",

keywords = "Charge-spin dynamics, Terahertz spectroscopy, Ultrafast demagnetization",

author = "Hovan Lee and Cedric Weber and Manfred F{\"a}hnle and Mostafa Shalaby",

note = "Funding Information: Funding: C.W. was supported by grant EP/R02992X/1 from the UK Engineering and Physical Sciences Research Council (EPSRC). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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AU - Lee, Hovan

AU - Weber, Cedric

AU - Fähnle, Manfred

AU - Shalaby, Mostafa

N1 - Funding Information: Funding: C.W. was supported by grant EP/R02992X/1 from the UK Engineering and Physical Sciences Research Council (EPSRC). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/10/19

Y1 - 2021/10/19

N2 - In past decades, ultrafast spin dynamics in magnetic systems have been associated with heat deposition from high energy laser pulses, limiting the selective access to spin order. Here, we use a long wavelength terahertz (THz) pump–optical probe setup to measure structural features in the ultrafast time scale. We find that complete demagnetization is possible with <6 THz pulses. This occurs concurrently with longitudinal acoustic phonons and an electronic response.

AB - In past decades, ultrafast spin dynamics in magnetic systems have been associated with heat deposition from high energy laser pulses, limiting the selective access to spin order. Here, we use a long wavelength terahertz (THz) pump–optical probe setup to measure structural features in the ultrafast time scale. We find that complete demagnetization is possible with <6 THz pulses. This occurs concurrently with longitudinal acoustic phonons and an electronic response.

KW - Charge-spin dynamics

KW - Terahertz spectroscopy

KW - Ultrafast demagnetization

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Ultrafast electron dynamics in magnetic thin films

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Ultrafast electron dynamics in magnetic thin films

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