Journal Article

PUBDB-2023-05352

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Element-resolved evidence of superdiffusive spin current arising from ultrafast demagnetization process

Gupta, R. (Corresponding author) ; Cosco, F. ; Malik, V. K. ; Chen, X. ; Saha, S. ; GHOSH, A. ; Pohlmann, T.DESY* ; Mardegan, J. R. L.DESY* ; Francoual, S.DESY* ; Stefanuik, R. ; Chau Soederstroem, J.Extern*XFEL.EU* ; Sanyal, B. ; Karis, O. ; Svedlindh, P.Extern* ; Oppeneer, P.Extern*XFEL.EU* ; Knut, R.

2023
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevB.108.064427  doi:10.3204/PUBDB-2023-05352

Abstract: Using element-specific measurements of the ultrafast demagnetization of Ru/Fe$_{65}$Co$_{35}$ 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.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-S (FS-PETRA-S)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20200894 EC (I-20200894-EC) (I-20200894-EC)
4. s-NEBULA - Novel Spin-Based Building Blocks for Advanced TeraHertz Applications (863155) (863155)
5. SWEDEN-DESY - SWEDEN-DESY Collaboration (2020_Join2-SWEDEN-DESY) (2020_Join2-SWEDEN-DESY)

Experiment(s):

1. PETRA Beamline P09 (PETRA III)

Appears in the scientific report 2023

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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