dc.contributor.author | Sala, Giacomo | |
dc.contributor.author | Lambert, Charles-Henri | |
dc.contributor.author | Finizio, Simone | |
dc.contributor.author | Raposo Funcia, Víctor Javier | |
dc.contributor.author | Krizakova, Viola | |
dc.contributor.author | Krishnaswamy, Gunasheel | |
dc.contributor.author | Weigand, Markus | |
dc.contributor.author | Raabe, Jorg | |
dc.contributor.author | Rossell, Marta D. | |
dc.contributor.author | Martínez Vecino, Eduardo | |
dc.contributor.author | Gambardella, Pietro | |
dc.date.accessioned | 2023-10-03T11:55:46Z | |
dc.date.available | 2023-10-03T11:55:46Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 1476-1122 | |
dc.identifier.uri | http://hdl.handle.net/10366/153137 | |
dc.description.abstract | Ferrimagnetic alloys are model systems for understanding the ultrafast magnetization switching in materials with antiferromagnetically-coupled sublattices. Here we investigate the dynamics of the rare-earth and transition-metal sublattices in ferrimagnetic GdFeCo and TbCo dots excited by spin-orbit torques with combined temporal, spatial, and elemental resolution. We observe distinct switching regimes in which the magnetizations of the two sublattices either remain syn-6
chronized throughout the reversal process or switch following different trajectories in time and space. In the latter case, we observe a transient ferromagnetic state that lasts up to 2 ns. The asynchronous switching of the two magnetizations is ascribed to the master-agent dynamics induced by the spin-orbit torques in combination with the weak antiferromagnetic coupling, which depends sensitively on the microstructure of ferrimagnets. A larger antiferromagnetic exchange between the two sublattices leads to faster switching and shorter recovery of the magnetization after a current pulse. | es_ES |
dc.description.sponsorship | We thank M. Baumgartner and C. Murer for fruitful discussions and help with the
STXM measurements, and F. Binda for the assistance with the measurements at the
vibrating sample magnetometer. We thank R. Erni for collaborating in the analysis of
the diffraction measurements. We thank C. Vockenhuber for performing Rutherford
backscattering measurements on GdFeCo and TbCo. This research was supported by
the Swiss National Science Foundation (grant nos 200020_200465 and PZ00P2-179944)
and the Swiss Government Excellence Scholarship (ESKAS no. 2018.0056). The PolLux
end station was financed by the German Ministerium für Bildung und Forschung
(BMBF) through contracts 05K16WED and 05K19WE2. The work by E.M. and V.R. was
supported by the Ministerio de Economía y Competitividad of the Spanish Government
(project no. MAT2017-87072-C4-1-P) and by the Consejería de Educación of the
Junta de Castilla y Leon (project nos SA299P18 and SA0114P20). We acknowledge
the Paul Scherrer Institut, Villigen, Switzerland for provision of synchrotron radiation
beamtime at beamline X07DA-PolLux of the Swiss Light Source. We also thank the Helmholtz-Zentrum Berlin for the allocation of synchrotron radiation beamtime at the
UE-46 Maxymus beamline. | es_ES |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | es_ES |
dc.subject | Magnetism | es_ES |
dc.subject | Computational physics | es_ES |
dc.title | Asynchronous current-induced switching of rare-earth and transition-metal sublattices in ferrimagnetic alloys | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.relation.publishversion | https://doi.org/10.1038/s41563-022-01248-8 | es_ES |
dc.identifier.doi | 10.1038/s41563-022-01248-8 | |
dc.relation.projectID | MAT2017-87072-C4-1-P | es_ES |
dc.relation.projectID | SA299P18 | es_ES |
dc.relation.projectID | SA0114P20 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |
dc.identifier.essn | 1476-4660 | |
dc.journal.title | Nature Materials | es_ES |
dc.volume.number | 21 | es_ES |
dc.issue.number | 6 | es_ES |
dc.page.initial | 640 | es_ES |
dc.page.final | 646 | es_ES |
dc.type.hasVersion | info:eu-repo/semantics/publishedVersion | es_ES |