Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Element-resolved evidence of superdiffusive spin current arising from ultrafast demagnetization process

Gupta, R. ; Cosco, F. ; Malik, R. S. ; Chen, X. ; Saha, S. ; Ghosh, A. LU ; Pohlmann, T. ; Mardegan, J. R.L. ; Francoual, S. and Stefanuik, R. , et al. (2023) In Physical Review B 108(6).
Abstract

Using element-specific measurements of the ultrafast demagnetization of Ru/Fe65Co35 hetero-structures, we show that Ru can exhibit a significant magnetic contrast (3% asymmetry) resulting from ultrafast spin currents emanating from the demagnetization process of the FeCo layer. We use this magnetic contrast to investigate how superdiffusive spin currents are affected by the doping of heavy elements in the FeCo layer. We find that the spin currents are strongly suppressed, and that the recovery process in Ru slows down by Re doping. This is in accordance with a change in interface reflectivity of spin currents as found by the superdiffusive spin transport model.

Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
108
issue
6
article number
064427
publisher
American Physical Society
external identifiers
  • scopus:85169289823
ISSN
2469-9950
DOI
10.1103/PhysRevB.108.064427
language
English
LU publication?
yes
id
4157d232-a427-45f0-97d1-034db99106df
date added to LUP
2023-12-19 16:29:16
date last changed
2023-12-19 16:29:16
@article{4157d232-a427-45f0-97d1-034db99106df,
  abstract     = {{<p>Using element-specific measurements of the ultrafast demagnetization of Ru/Fe65Co35 hetero-structures, we show that Ru can exhibit a significant magnetic contrast (3% asymmetry) resulting from ultrafast spin currents emanating from the demagnetization process of the FeCo layer. We use this magnetic contrast to investigate how superdiffusive spin currents are affected by the doping of heavy elements in the FeCo layer. We find that the spin currents are strongly suppressed, and that the recovery process in Ru slows down by Re doping. This is in accordance with a change in interface reflectivity of spin currents as found by the superdiffusive spin transport model.</p>}},
  author       = {{Gupta, R. and Cosco, F. and Malik, R. S. and Chen, X. and Saha, S. and Ghosh, A. and Pohlmann, T. and Mardegan, J. R.L. and Francoual, S. and Stefanuik, R. and Söderström, J. and Sanyal, B. and Karis, O. and Svedlindh, P. and Oppeneer, P. M. and Knut, R.}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{6}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Element-resolved evidence of superdiffusive spin current arising from ultrafast demagnetization process}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.108.064427}},
  doi          = {{10.1103/PhysRevB.108.064427}},
  volume       = {{108}},
  year         = {{2023}},
}