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Anatomy of ultrafast quantitative magnetoacoustics in freestanding nickel thin films

  • We revisit the quantitative analysis of the ultrafast magnetoacoustic experiment in a freestanding nickel thin film by Kim and Bigot [J.-W. Kim and J.-Y. Bigot, Phys. Rev. B 95, 144422 (2017)] by applying our recently proposed approach of magnetic and acoustic eigenmode decomposition. We show that the application of our modeling to the analysis of time-resolved reflectivity measurements allows forWe revisit the quantitative analysis of the ultrafast magnetoacoustic experiment in a freestanding nickel thin film by Kim and Bigot [J.-W. Kim and J.-Y. Bigot, Phys. Rev. B 95, 144422 (2017)] by applying our recently proposed approach of magnetic and acoustic eigenmode decomposition. We show that the application of our modeling to the analysis of time-resolved reflectivity measurements allows for the determination of amplitudes and lifetimes of standing perpendicular acoustic phonon resonances with unprecedented accuracy. The acoustic damping is found to scale as ∝ω2 for frequencies up to 80 GHz, and the peak amplitudes reach 10−3. The experimentally measured magnetization dynamics for different orientations of an external magnetic field agrees well with numerical solutions of magnetoelastically driven magnon harmonic oscillators. Symmetry-based selection rules for magnon-phonon interactions predicted by our modeling approach allow for the unambiguous discrimination between spatially uniform and nonuniform modes, as confirmed by comparing the resonantly enhanced magnetoelastic dynamics simultaneously measured on opposite sides of the film. Moreover, the separation of timescales for (early) rising and (late) decreasing precession amplitudes provide access to magnetic (Gilbert) and acoustic damping parameters in a single measurement.show moreshow less

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Metadaten
Document Type:Article (reviewed)
Zitierlink: https://opus.hs-offenburg.de/8418
Bibliografische Angaben
Title (English):Anatomy of ultrafast quantitative magnetoacoustics in freestanding nickel thin films
Author:Antonia Ghita, Tudor-Gabriel Mocioi, Alexey M. LomonosovStaff MemberORCiDGND, Jiwan Kim, Oleksandr Kovalenko, Paolo Vavassori, Vasily Temnov
Year of Publication:2023
Creating Corporation:American Physical Society
Page Number:9
Article Number:134419
Parent Title (English):Physical Review B
Volume:107
Issue:13
ISSN:2469-9969
DOI:https://doi.org/10.1103/PhysRevB.107.134419
Language:English
Inhaltliche Informationen
Institutes:Fakultät Wirtschaft (W)
Collections of the Offenburg University:Bibliografie
Tag:Magnetization dynamics; Magnetoacoustic effect; Spin dynamics; Ultrafast magnetic effects
Formale Angaben
Relevance for "Jahresbericht über Forschungsleistungen":Wiss. Zeitschriftenartikel reviewed: Listung in Master Journal List
Open Access: Open Access 
 Grün 
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International
ArXiv Id:http://arxiv.org/abs/2212.12673