Journal Article

PUBDB-2024-06118

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Terahertz-driven coherent magnetization dynamics in labyrinth-type domain networks

Riepp, M. (Corresponding author)XFEL.EU*DESY* ; Philippi-Kobs, A.XFEL.EU*DESY* ; Müller, L. L. G.DESY* ; Roseker, W.DESY* ; Rysov, R.XFEL.EU*DESY* ; Frömter, R. ; Bagschik, K.DESY* ; Hennes, M. ; Gupta, D. ; Marotzke, S.DESY* ; Walther, M.DESY* ; Bajt, S.CFEL*XFEL.EU*DESY* ; Pan, R.DESY* ; Golz, T.Extern* ; Stojanovic, N.Extern* ; Boeglin, C. ; Gruebel, G.XFEL.EU*DESY*

2024
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevB.110.094405  doi:10.3204/PUBDB-2024-06118

Abstract: The controlled manipulation of spins on ultrashort timescales is among the most promising solutions for novel high-speed and low-power-consumption spintronic and magnetic recording applications. To do so, terahertz (THz) light pulses can be used to drive coherent magnetization dynamics in ferromagnetic thin films. We were able to resolve these dynamics on the nanoscale employing THz-pump x-ray resonant magnetic scattering from the labyrinth-type domain network of a Co/Pt multilayer with perpendicular magnetic anisotropy. Our results reveal THz-driven ultrafast demagnetization as well as coherent local magnetization oscillations at the THz fundamental frequency of 2.5THz. We observe a temporal lag between femtosecond demagnetization and the start of the coherent magnetization oscillations that can be understood by a time-dependent damping. The dynamics of the domain and domain-wall contributions are found to be highly correlated, suggesting the applicability of THz spin control in magnetic nanostructures.

Note: Deutsche Forschungsgemeinschaft(DFG)–SFB-925–Project ID No. 170620586

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Contributing Institute(s):

1. Coherent X-ray Scattering (FS-CXS)
2. Experimentebetreuung FLASH (FS-FL)
3. Beamline Optics Simulation (FS-PETRA-BO)
4. PETRA-S (FS-PETRA-S)
5. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G2 - FLASH (DESY) (POF4-6G2) (POF4-6G2)
3. AIM, DFG project G:(GEPRIS)390715994 - EXC 2056: CUI: Advanced Imaging of Matter (390715994) (390715994)
4. DFG project G:(GEPRIS)170620586 - SFB 925: Licht-induzierte Dynamik und Kontrolle korrelierter Quantensysteme (170620586) (170620586)

Experiment(s):

1. FLASH Beamline BL3 (FLASH)
2. FLASH THz Undulator Beamline (FLASH)

Appears in the scientific report 2024

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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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