Excitation and detection of coherent nanoscale spin waves via extreme ultraviolet transient gratings.

Autor: Miedaner PR; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA., Berndt N; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA., Deschamps J; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA., Urazhdin S; Department of Physics, Emory University, Atlanta, GA, USA., Khatu N; Elettra Sincrotrone Trieste, Basovizza, Italy.; Department of Molecular Sciences and Nanosystems, Ca'Foscari University of Venice, Venice, Italy.; European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany., Fainozzi D; Elettra Sincrotrone Trieste, Basovizza, Italy., Brioschi M; Dipartimento di Fisica, Università degli Studi di Milano, Milano, Italy.; CNR-Istituto Officina dei Materiali, Trieste, Italy., Carrara P; Dipartimento di Fisica, Università degli Studi di Milano, Milano, Italy.; CNR-Istituto Officina dei Materiali, Trieste, Italy., Cucini R; CNR-Istituto Officina dei Materiali, Trieste, Italy., Rossi G; Dipartimento di Fisica, Università degli Studi di Milano, Milano, Italy.; CNR-Istituto Officina dei Materiali, Trieste, Italy., Wittrock S; Helmholtz-Zentrum Berlin Für Materialien und Energie GmbH, Hahn-Metiner-Platz 1, 14109 Berlin, Germany.; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2A, 12489 Berlin, Germany., Ksenzov D; Department Physik, Universität Siegen, Siegen, Germany., Mincigrucci R; Elettra Sincrotrone Trieste, Basovizza, Italy., Bencivenga F; Elettra Sincrotrone Trieste, Basovizza, Italy., Foglia L; Elettra Sincrotrone Trieste, Basovizza, Italy., Paltanin E; Elettra Sincrotrone Trieste, Basovizza, Italy.; Department of Physics, Università degli Studi di Trieste, 34127 Trieste, Italy., Bonetti S; Department of Molecular Sciences and Nanosystems, Ca'Foscari University of Venice, Venice, Italy.; Department of Physics, Stockholm University, Stockholm, Sweden., Engel D; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2A, 12489 Berlin, Germany., Schick D; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2A, 12489 Berlin, Germany., Gutt C; Department Physik, Universität Siegen, Siegen, Germany., Comin R; Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA., Nelson KA; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA., Maznev AA; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2024 Sep 06; Vol. 10 (36), pp. eadp6015. Date of Electronic Publication: 2024 Sep 06.
DOI: 10.1126/sciadv.adp6015
Abstrakt: The advent of free electron lasers has opened the opportunity to explore interactions between extreme ultraviolet (EUV) photons and collective excitations in solids. While EUV transient grating spectroscopy, a noncollinear four-wave mixing technique, has already been applied to probe coherent phonons, the potential of EUV radiation for studying nanoscale spin waves has not been harnessed. Here we report EUV transient grating experiments with coherent magnons in Fe/Gd ferrimagnetic multilayers. Magnons with tens of nanometers wavelengths are excited by a pair of femtosecond EUV pulses and detected via diffraction of a probe pulse tuned to an absorption edge of Gd. The results unlock the potential of nonlinear EUV spectroscopy for studying magnons and provide a tool for exploring spin waves in a wave vector range not accessible by established inelastic scattering techniques.
Databáze: MEDLINE