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Antiparallel interface coupling evidenced by negative rotatable anisotropy in IrMn/NiFe bilayers

dc.contributor.authorSchäfer, Deisept_BR
dc.contributor.authorGrande, Pedro Luispt_BR
dc.contributor.authorPereira, Luis Gustavopt_BR
dc.contributor.authorAzevedo, Gustavo de Medeirospt_BR
dc.contributor.authorOliveira, Artur Harres dept_BR
dc.contributor.authorSousa, Marcos Antonio dept_BR
dc.contributor.authorPelegrini, Fernandopt_BR
dc.contributor.authorGeshev, Julian Penkovpt_BR
dc.date.accessioned2015-11-18T02:38:29Zpt_BR
dc.date.issued2015pt_BR
dc.identifier.issn0021-8979pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/129850pt_BR
dc.description.abstractNegative rotatable anisotropy is estimated via ferromagnetic resonance measurements in as-made, annealed, and ion-irradiated IrMn3/Ni81Fe19 bilayers. Opposite to previous observations, inverse correlation between rotatable anisotropy and coercivity is observed. The exchange-bias field, determined from hysteresis loop measurements, is higher than that obtained from ferromagnetic resonance for all samples. The results are discussed in terms of majority antiparallel coupling and magnetic-field-induced transitions from antiparallel to parallel states of uncompensated spins at ferromagnet/ antiferromagnet interface. We affirm that an observation of negative rotatable anisotropy evidences antiparallel coupling even in systems presenting conventional exchange biasen
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofJournal of applied physics. New York. Vol. 117, no. 21 (June 2015), 215301, 6 p.pt_BR
dc.rightsOpen Accessen
dc.subjectHisterese magnéticapt_BR
dc.subjectAnisotropia magnéticapt_BR
dc.subjectMagnetismo de interfacept_BR
dc.subjectRessonancia ferromagneticapt_BR
dc.subjectMateriais ferromagnéticospt_BR
dc.subjectMateriais antiferromagnéticospt_BR
dc.subjectForca coercivapt_BR
dc.subjectLigas de pratapt_BR
dc.subjectLigas de manganêspt_BR
dc.subjectLigas de ferropt_BR
dc.subjectLigas de irídiopt_BR
dc.titleAntiparallel interface coupling evidenced by negative rotatable anisotropy in IrMn/NiFe bilayerspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000977293pt_BR
dc.type.originEstrangeiropt_BR


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