Phonon-magnon resonant processes with relevance to acoustic spin pumping

Handle URI:
http://hdl.handle.net/10754/346753
Title:
Phonon-magnon resonant processes with relevance to acoustic spin pumping
Authors:
Deymier, P. A.; Vasseur, J. O.; Runge, K.; Manchon, Aurelien ( 0000-0002-4768-293X ) ; Bou-Matar, O.
Abstract:
The recently described phenomenon of resonant acoustic spin pumping is due to resonant coupling between an incident elastic wave and spin waves in a ferromagnetic medium. A classical one-dimensional discrete model of a ferromagnet with two forms of magnetoelastic coupling is treated to shed light on the conditions for resonance between phonons and magnons. Nonlinear phonon-magnon interactions in the case of a coupling restricted to diagonal terms in the components of the spin degrees of freedom are analyzed within the framework of the multiple timescale perturbation theory. In that case, one-phonon-two-magnon resonances are the dominant mechanism for pumping. The effect of coupling on the dispersion relations depends on the square of the amplitude of the phonon and magnon excitations. A straightforward analysis of a linear phonon-magnon interaction in the case of a magnetoelastic coupling restricted to off-diagonal terms in the components of the spins shows a one-phonon to one-magnon resonance as the pumping mechanism. The resonant dispersion relations are independent of the amplitude of the waves. In both cases, when an elastic wave with a fixed frequency is used to stimulate magnons, application of an external magnetic field can be used to approach resonant conditions. Both resonance conditions exhibit the same type of dependency on the strength of an applied magnetic field.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Phonon-magnon resonant processes with relevance to acoustic spin pumping 2014, 90 (22) Physical Review B
Publisher:
American Physical Society
Journal:
Physical Review B
Issue Date:
23-Dec-2014
DOI:
10.1103/PhysRevB.90.224421
Type:
Article
ISSN:
1098-0121; 1550-235X
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.90.224421
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorDeymier, P. A.en
dc.contributor.authorVasseur, J. O.en
dc.contributor.authorRunge, K.en
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorBou-Matar, O.en
dc.date.accessioned2015-03-17T06:11:20Zen
dc.date.available2015-03-17T06:11:20Zen
dc.date.issued2014-12-23en
dc.identifier.citationPhonon-magnon resonant processes with relevance to acoustic spin pumping 2014, 90 (22) Physical Review Ben
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.90.224421en
dc.identifier.urihttp://hdl.handle.net/10754/346753en
dc.description.abstractThe recently described phenomenon of resonant acoustic spin pumping is due to resonant coupling between an incident elastic wave and spin waves in a ferromagnetic medium. A classical one-dimensional discrete model of a ferromagnet with two forms of magnetoelastic coupling is treated to shed light on the conditions for resonance between phonons and magnons. Nonlinear phonon-magnon interactions in the case of a coupling restricted to diagonal terms in the components of the spin degrees of freedom are analyzed within the framework of the multiple timescale perturbation theory. In that case, one-phonon-two-magnon resonances are the dominant mechanism for pumping. The effect of coupling on the dispersion relations depends on the square of the amplitude of the phonon and magnon excitations. A straightforward analysis of a linear phonon-magnon interaction in the case of a magnetoelastic coupling restricted to off-diagonal terms in the components of the spins shows a one-phonon to one-magnon resonance as the pumping mechanism. The resonant dispersion relations are independent of the amplitude of the waves. In both cases, when an elastic wave with a fixed frequency is used to stimulate magnons, application of an external magnetic field can be used to approach resonant conditions. Both resonance conditions exhibit the same type of dependency on the strength of an applied magnetic field.en
dc.publisherAmerican Physical Societyen
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.90.224421en
dc.rightsArchived with thanks to Physical Review Ben
dc.titlePhonon-magnon resonant processes with relevance to acoustic spin pumpingen
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 Materials Science and Engineering, University of Arizona, Tucson, Arizona 85721, USAen
dc.contributor.institutionInstitut d’Electronique, de Micro-électronique et de Nanotechnologie, UMR CNRS 8520, Cité Scientifique, 59652 Villeneuve d’Ascq Cedex, Franceen
dc.contributor.institutionInternational Associated Laboratory LEMAC/LICS: IEMN, UMR CNRS 8520, PRES Lille Nord de France, Ecole Centrale Lille, 59652 Villeneuve d’Ascq, Franceen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorManchon, Aurelienen
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