Theory of laser-induced demagnetization at high temperatures

Handle URI:
http://hdl.handle.net/10754/552989
Title:
Theory of laser-induced demagnetization at high temperatures
Authors:
Manchon, Aurelien ( 0000-0002-4768-293X ) ; Li, Q.; Xu, L.; Zhang, S.
Abstract:
Laser-induced demagnetization is theoretically studied by explicitly taking into account interactions among electrons, spins, and lattice. Assuming that the demagnetization processes take place during the thermalization of the subsystems, the temperature dynamics is given by the energy transfer between the thermalized interacting baths. These energy transfers are accounted for explicitly through electron-magnon and electron-phonon interactions, which govern the demagnetization time scale. By properly treating the spin system in a self-consistent random phase approximation, we derive magnetization dynamic equations for a broad range of temperature. The dependence of demagnetization on the temperature and pumping laser intensity is calculated in detail. In particular, we show several salient features for understanding magnetization dynamics near the Curie temperature. While the critical slowdown in dynamics occurs, we find that an external magnetic field can restore the fast dynamics. We discuss the implication of the fast dynamics in the application of heat-assisted magnetic recording.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Theory of laser-induced demagnetization at high temperatures 2012, 85 (6) Physical Review B
Journal:
Physical Review B
Issue Date:
17-Feb-2012
DOI:
10.1103/PhysRevB.85.064408
Type:
Article
ISSN:
1098-0121; 1550-235X
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.85.064408; http://arxiv.org/abs/1112.2428
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorLi, Q.en
dc.contributor.authorXu, L.en
dc.contributor.authorZhang, S.en
dc.date.accessioned2015-05-17T20:43:12Zen
dc.date.available2015-05-17T20:43:12Zen
dc.date.issued2012-02-17en
dc.identifier.citationTheory of laser-induced demagnetization at high temperatures 2012, 85 (6) Physical Review Ben
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.85.064408en
dc.identifier.urihttp://hdl.handle.net/10754/552989en
dc.description.abstractLaser-induced demagnetization is theoretically studied by explicitly taking into account interactions among electrons, spins, and lattice. Assuming that the demagnetization processes take place during the thermalization of the subsystems, the temperature dynamics is given by the energy transfer between the thermalized interacting baths. These energy transfers are accounted for explicitly through electron-magnon and electron-phonon interactions, which govern the demagnetization time scale. By properly treating the spin system in a self-consistent random phase approximation, we derive magnetization dynamic equations for a broad range of temperature. The dependence of demagnetization on the temperature and pumping laser intensity is calculated in detail. In particular, we show several salient features for understanding magnetization dynamics near the Curie temperature. While the critical slowdown in dynamics occurs, we find that an external magnetic field can restore the fast dynamics. We discuss the implication of the fast dynamics in the application of heat-assisted magnetic recording.en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.85.064408en
dc.relation.urlhttp://arxiv.org/abs/1112.2428en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleTheory of laser-induced demagnetization at high temperaturesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Physics, University of Arizona, Tucson, Arizona 85721, USAen
dc.identifier.arxividarXiv:1112.2428en
kaust.authorManchon, Aurelienen
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