Element-specific magnetization damping in ferrimagnetic DyCo5 alloys revealed by ultrafast X-ray measurements

dc.contributor.authorAbrudan, Radu
dc.contributor.authorHennecke, Martin
dc.contributor.authorRadu, Florin
dc.contributor.authorKachel, Torsten
dc.contributor.authorHolldack, Karsten
dc.contributor.authorMitzner, Rolf
dc.contributor.authorDonges, Andreas
dc.contributor.authorKhmelevskyi, Sergii
dc.contributor.authorDeák, András
dc.contributor.authorSzunyogh, László
dc.contributor.authorNowak, Ulrich
dc.contributor.authorEisebitt, Stefan
dc.contributor.authorRadu, Ilie
dc.date.accessioned2021-09-21T14:06:50Z
dc.date.available2021-09-21T14:06:50Z
dc.date.issued2021-05-06
dc.description.abstractThe dynamic response of magnetically ordered materials to an ultrashort external stimulus depends on microscopic parameters, such as magnetic moment, exchange, and spin–orbit interactions. Whereas it is well established that, in multicomponent magnetic alloys and compounds, the speed of demagnetization and spin switching processes has an element-specific character, the magnetization damping was assumed to be a universal parameter for all constituent magnetic elements irrespective of their different spin–orbit couplings and electronic structure. Herein, experimental and theoretical evidence for an element-specific magnetic damping parameter is provided by investigating the ultrafast magnetization response of a high-anisotropy ferrimagnetic DyCo5 alloy to femtosecond laser excitation. Strikingly different demagnetization and remagnetization dynamics of Dy and Co magnetic moments is revealed by employing femtosecond laser pump–X-ray magnetic circular dichroism probe measurements combined with atomistic spin dynamics (ASD) simulations using ab initio calculated parameters. These observations, fully corroborated by the ASD simulations, are linked to the element-specific spin–orbit coupling strengths of Dy and Co, which are incorporated in the phenomenological magnetization damping parameters. These findings can be used as a recipe for tuning the speed and magnitude of laser-driven magnetic processes and consequently allow control over various dynamic functionalities in multicomponent magnetic materials.en
dc.description.sponsorshipBMBF, 05K16BCA, Verbundprojekt 05K2016 - Femto-THz-X: Controlling Ultrafast Phase Transitions by Selective Excitations of Phonons, Magnons and Polaritons (Teilprojekt 1)en
dc.description.sponsorshipEC/H2020/681917/EU/Ultrafast spin transport and magnetic order controlled by terahertz electromagnetic pulses/TERAMAGen
dc.description.sponsorshipBMBF, 05K10PC2, Verbundprojekt VEKMAG: Ein UHV-kompatibler Vektormagnet für elementspezifische und zeitaufgelöste FMR, EPR, Spektroskopie- und Streuexperimente. Teilprojekt 3: Resonante und zeitaufgelöste magnetische Röntgenstreuung.en
dc.description.sponsorshipDFG, 425217212, SFB 1432: Fluktuationen und Nichtlinearitäten in klassischer und Quantenmaterie jenseits des Gleichgewichtsen
dc.identifier.eissn1862-6270
dc.identifier.issn1862-6254
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/13626
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-12413
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc530 Physikde
dc.subject.otheratomistic spin dynamics simulationsen
dc.subject.otherfemtosecond X-ray spectroscopyen
dc.subject.otherferrimagnetsen
dc.subject.othermagnetization dampingen
dc.subject.otherultrafast magnetismen
dc.titleElement-specific magnetization damping in ferrimagnetic DyCo5 alloys revealed by ultrafast X-ray measurementsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber2100047en
dcterms.bibliographicCitation.doi10.1002/pssr.202100047en
dcterms.bibliographicCitation.issue8en
dcterms.bibliographicCitation.journaltitlePhysica Status Solidien
dcterms.bibliographicCitation.originalpublishernameWileyen
dcterms.bibliographicCitation.originalpublisherplaceNew York, NYen
dcterms.bibliographicCitation.volume15en
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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