Transient magnetic gratings on the nanometer scale

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dc.contributor.authorWeder, David
dc.contributor.authorKorff Schmising, Clemens von
dc.contributor.authorGünther, Christian Michael
dc.contributor.authorSchneider, Michael
dc.contributor.authorEngel, Dieter
dc.contributor.authorHessing, P.
dc.contributor.authorStruber, Christian
dc.contributor.authorWeigand, M.
dc.contributor.authorVodungbo, B.
dc.contributor.authorJan, Emmanuelle
dc.contributor.authorLiu, X.
dc.contributor.authorMerhe, Alaa el dine
dc.contributor.authorPedersoli, Emanuele
dc.contributor.authorCapotondi, Flavio
dc.contributor.authorLüning, J.
dc.contributor.authorPfau, Bastian
dc.contributor.authorEisebitt, Stefan
dc.date.accessioned2021-11-22T07:34:38Z
dc.date.available2021-11-22T07:34:38Z
dc.date.issued2020-09-08
dc.description.abstractLaser-driven non-local electron dynamics in ultrathin magnetic samples on a sub-10 nm length scale is a key process in ultrafast magnetism. However, the experimental access has been challenging due to the nanoscopic and femtosecond nature of such transport processes. Here, we present a scattering-based experiment relying on a laser-induced electro- and magneto-optical grating in a Co/Pd ferromagnetic multilayer as a new technique to investigate non-local magnetization dynamics on nanometer length and femtosecond timescales. We induce a spatially modulated excitation pattern using tailored Al near-field masks with varying periodicities on a nanometer length scale and measure the first four diffraction orders in an x-ray scattering experiment with magnetic circular dichroism contrast at the free-electron laser facility FERMI, Trieste. The design of the periodic excitation mask leads to a strongly enhanced and characteristic transient scattering response allowing for sub-wavelength in-plane sensitivity for magnetic structures. In conjunction with scattering simulations, the experiment allows us to infer that a potential ultrafast lateral expansion of the initially excited regions of the magnetic film mediated by hot-electron transport and spin transport remains confined to below three nanometers.en
dc.description.sponsorshipDFG, 328545488, TRR 227: Ultraschnelle Spindynamiken
dc.identifier.eissn2329-7778
dc.identifier.pmid32923511en
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/13926
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-12700
dc.language.isoen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc530 Physiken
dc.subject.otheroptical propertiesen
dc.subject.otherscattering problemen
dc.subject.otherFourier analysisen
dc.subject.otherelectronic transporten
dc.subject.otherfree electron lasersen
dc.subject.othermagnetic circular dichroism spectroscopyen
dc.subject.otherX-ray scatteringen
dc.subject.othermagnetization dynamicsen
dc.subject.othertransport propertiesen
dc.titleTransient magnetic gratings on the nanometer scaleen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber54501
dcterms.bibliographicCitation.doi10.1063/4.0000017
dcterms.bibliographicCitation.issue5
dcterms.bibliographicCitation.journaltitleStructural Dynamicsen
dcterms.bibliographicCitation.originalpublishernameAmerican Institute of Physics (AIP)en
dcterms.bibliographicCitation.originalpublisherplaceMelville, NYen
dcterms.bibliographicCitation.volume7
tub.accessrights.dnbfreeen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Optik und Atomare Physik::FG Röntgenoptik und Nanometer-Optikde
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Röntgenoptik und Nanometer-Optikde
tub.affiliation.instituteInst. Optik und Atomare Physikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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