Tracking picosecond strain pulses in heterostructures that exhibit giant magnetostriction
- We combine ultrafast X-ray diffraction (UXRD) and time-resolved Magneto-Optical Kerr Effect (MOKE) measurements to monitor the strain pulses in laser-excited TbFe2/Nb heterostructures. Spatial separation of the Nb detection layer from the laser excitation region allows for a background-free characterization of the laser-generated strain pulses. We clearly observe symmetric bipolar strain pulses if the excited TbFe2 surface terminates the sample and a decomposition of the strain wavepacket into an asymmetric bipolar and a unipolar pulse, if a SiO2 glass capping layer covers the excited TbFe2 layer. The inverse magnetostriction of the temporally separated unipolar strain pulses in this sample leads to a MOKE signal that linearly depends on the strain pulse amplitude measured through UXRD. Linear chain model simulations accurately predict the timing and shape of UXRD and MOKE signals that are caused by the strain reflections from multiple interfaces in the heterostructure.
Author details: | Steffen Peer ZeuschnerORCiDGND, Tymur Parpiiev, Thomas PezerilORCiD, Arnaud Hillion, Karine DumesnilORCiD, Abdelmadjid AnaneORCiD, Jan-Etienne PudellORCiDGND, Lisa WilligORCiDGND, Matthias RössleORCiDGND, Marc HerzogORCiDGND, Alexander von ReppertORCiDGND, Matias BargheerORCiDGND |
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DOI: | https://doi.org/10.1063/1.5084140 |
ISSN: | 2329-7778 |
Title of parent work (English): | Structural Dynamics |
Publisher: | AIP Publishing LLC |
Place of publishing: | Melville, NY |
Publication type: | Article |
Language: | English |
Date of first publication: | 2019/03/20 |
Publication year: | 2019 |
Release date: | 2019/05/03 |
Tag: | Bragg peak; Crystal lattices; Heterostructures; Lasers; Magnetism; Magnetooptical effects; Metal oxides; Phonons; Transition metals; Ultrafast X-ray diffraction |
Volume: | 6 |
Issue: | 2 |
Number of pages: | 9 |
Funding institution: | Universität Potsdam |
Funding number: | PA 2019_25 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät |
DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Peer review: | Referiert |
Grantor: | Publikationsfonds der Universität Potsdam |
Publishing method: | Open Access |
License (German): | CC-BY - Namensnennung 4.0 International |
External remark: | Zweitveröffentlichung in der Schriftenreihe Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe 706 |