Towards shaping picosecond strain pulses via magnetostrictive transducers - Archive ouverte HAL
Article Dans Une Revue Photoacoustics Année : 2023

Towards shaping picosecond strain pulses via magnetostrictive transducers

Résumé

Using time-resolved x-ray diffraction, we demonstrate the manipulation of the picosecond strain response of a metallic heterostructure consisting of a dysprosium (Dy) transducer and a niobium (Nb) detection layer by an external magnetic field. We utilize the first-order ferromagnetic-antiferromagnetic phase transition of the Dy layer, which provides an additional large contractive stress upon laser excitation compared to its zerofield response. This enhances the laser-induced contraction of the transducer and changes the shape of the picosecond strain pulses driven in Dy and detected within the buried Nb layer. Based on our experiment with rare-earth metals we discuss required properties for functional transducers, which may allow for novel field-control of the emitted picosecond strain pulses.
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hal-04305907 , version 1 (24-11-2023)

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Maximilian Mattern, Jan-Etienne Pudell, Karine Dumesnil, Alexander von Reppert, Matias Bargheer. Towards shaping picosecond strain pulses via magnetostrictive transducers. Photoacoustics, 2023, 30, pp.100463. ⟨10.1016/j.pacs.2023.100463⟩. ⟨hal-04305907⟩
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