Probing equilibrium by nonequilibrium dynamics: Aging in Co/Cr superlattices

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dc.contributorVirginia Techen
dc.contributor.authorMukherjee, T.en
dc.contributor.authorPleimling, Michel J.en
dc.contributor.authorBinek, C.en
dc.contributor.departmentPhysicsen
dc.date.accessed2014-04-23en
dc.date.accessioned2014-05-07T15:37:04Zen
dc.date.available2014-05-07T15:37:04Zen
dc.date.issued2010-10en
dc.description.abstractMagnetization relaxation is investigated in a structurally ordered magnetic Co/Cr superlattice. Tailored nanoscale periodicity creates mesoscopic spatial magnetic correlations with slow relaxation dynamics when quenching the system into a nonequilibrium state. Magnetization transients are measured after exposing the heterostructure to a magnetic set field for various waiting times. Scaling analysis reveals an asymptotic power-law behavior in accordance with a full aging scenario. The temperature dependence of the relaxation exponent shows pronounced anomalies at the equilibrium phase transitions of the antiferromagnetic superstructure and the ferromagnetic to paramagnetic transition of the Co layers. The latter leaves only weak fingerprints in the equilibrium magnetic behavior but gives rise to a prominent change in nonequilibrium properties. Our findings suggest scaling analysis of nonequilibrium data as a probe for weak equilibrium phase transitions.en
dc.description.sponsorshipNRIen
dc.description.sponsorshipNSF through EPSCoR DMR-0547887en
dc.description.sponsorshipMRSEC 0820521, DMR-0904999en
dc.identifier.citationMukherjee, T.; Pleimling, M.; Binek, C., "Probing equilibrium by nonequilibrium dynamics: Aging in Co/Cr superlattices," Phys. Rev. B 82, 134425 DOI: http://dx.doi.org/10.1103/PhysRevB.82.134425en
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.82.134425en
dc.identifier.issn1098-0121en
dc.identifier.urihttp://hdl.handle.net/10919/47876en
dc.identifier.urlhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.82.134425en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectmagnetization dataen
dc.subjectfilmsen
dc.subjectmagnetismen
dc.subjectsystemsen
dc.subjectphysics, condensed matteren
dc.titleProbing equilibrium by nonequilibrium dynamics: Aging in Co/Cr superlatticesen
dc.title.serialPhysical Review Ben
dc.typeArticle - Refereeden

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