Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf
1 PublikationFemtosecond Laser-Induced Transient Magnetization Enhancement and Ultrafast Demagnetization Mediated by Domain Wall Origami
Kumar Mondal, A.; Mukhopadhyay, S.; Heinig, P.; Salikhov, R.; Hellwig, O.; Barman, A.
Abstract
Femtosecond laser-induced ultrafast magnetization dynamics are all-optically probed for different remanent magnetic domain states of a [Co/Pt]22 multilayer sample, thus revealing the tunability of the direct transport of spin angular momentum across domain walls. A variety of different magnetic domain configurations (domain wall origami) at remanence achieved by applying different magnetic field histories are investigated by time-resolved magneto-optical Kerr effect magnetometry to probe the ultrafast magnetization dynamics. Depending on the underlying domain landscape, the spin-transport-driven magnetization dynamics show a transition from typical ultrafast demagnetization to being fully dominated by an anomalous transient magnetization enhancement (TME) via a state in which both TME and demagnetization coexist in the system. Thereby, the study reveals an extrinsic channel for the modulation of spin transport, which introduces a route for the development of magnetic spin-texture-driven ultrafast spintronic devices.
Keywords: anomalous transient magnetization enhancement; ultrafast demagnetization; spin current; superdiffusive spin transport; TR-MOKE; magnetic domain
Beteiligte Forschungsanlagen
- Ionenstrahlzentrum DOI: 10.17815/jlsrf-3-159
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-3-159 is cited by this (Id 39313) publication
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ACS Nano 18(2024)26, 16914-16922
DOI: 10.1021/acsnano.4c02910
Permalink: https://www.hzdr.de/publications/Publ-39313
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