Tracking picosecond strain pulses in heterostructures that exhibit giant magnetostriction

Autor: Parpiiev, S. P. Zeuschner T., Pezeril, T., Hillion, A., Dumesnil, K., Anane, M., Pudell, J., Willig, L., Rössle, M., Herzog, M., von Reppert, A., Bargheer, M.

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 excit

Externí odkaz: http://arxiv.org/abs/1812.01512

Unconventional picosecond strain pulses resulting from the saturation of magnetic stress within a photoexcited rare earth layer

Autor: A. von Reppert, M. Mattern, J.-E. Pudell, S. P. Zeuschner, K. Dumesnil, M. Bargheer

Publikováno v: Structural Dynamics, Vol 7, Iss 2, Pp 024303-024303-12 (2020)

Optical excitation of spin-ordered rare earth metals triggers a complex response of the crystal lattice since expansive stresses from electron and phonon excitations compete with a contractive stress induced by spin disorder. Using ultrafast x-ray di

Externí odkaz: https://doaj.org/article/79654942b80147288f0e9fd6d1113407

Measurement of transient strain induced by two-photon excitation

Autor: S. P. Zeuschner, J.-E. Pudell, A. von Reppert, M. Deb, E. Popova, N. Keller, M. Rössle, M. Herzog, M. Bargheer

Publikováno v: Physical Review Research, Vol 2, Iss 2, p 022013 (2020)

By ultrafast x-ray diffraction we quantify the strain from coherent and incoherent phonons generated by one- and two-photon absorption. We investigated the ferrimagnetic insulator bismuth-doped yttrium iron garnet, which is a workhorse for laser-indu

Externí odkaz: https://doaj.org/article/490d5d0a797a4608bfc56fc44e1444db

Ultrafast control of lattice strain via magnetic circular dichroism

Autor: Matias Bargheer, M. Rössle, Niels Keller, Elena Popova, S. P. Zeuschner, Wolfram Leitenberger, Marwan Deb

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2021, 103, ⟨10.1103/physrevb.103.064301⟩

Using ultrafast x-ray diffraction, we directly monitor the lattice dynamics induced by femtosecond laser pulses in nanoscale thin films of bismuth iron garnet in external magnetic fields ${H}_{\mathrm{ext}}$. We control the ultrafast laser-induced la

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c628bc8aa008991d6c657ab49797ffb
https://hal.archives-ouvertes.fr/hal-03439604/file/PhysRevB.103.064301.pdf

Spin stress contribution to the lattice dynamics of FePt

Autor: Olav Hellwig, S. P. Zeuschner, Aurélien Crut, L. Willig, Fabian Ganss, V. Uhlíř, A. von Reppert, Matias Bargheer, Jon Ander Arregi, J.-E. Pudell, G. Sellge

Publikováno v: Science Advances
Science Advances, American Association for the Advancement of Science (AAAS), 2020, 6 (28), pp.eaba1142. ⟨10.1126/sciadv.aba1142⟩
Science Advances. 2020, vol. 6, issue 28, p. 1-7.
Science Advances, 2020, 6 (28), pp.eaba1142. ⟨10.1126/sciadv.aba1142⟩
Science Advances 6(2020)28, eaba1142

Two-pulse laser excitation of FePt nanolayers distinguishes ultrafast stresses of magnetic excitations from the Poisson effect.
Invar-behavior occurring in many magnetic materials has long been of interest to materials science. Here, we show not

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42d54a3e7ea84461fd09e2394d619503
https://hal.archives-ouvertes.fr/hal-02908738