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dc.contributor.authorSossmeier, K.D.pt_BR
dc.contributor.authorPereira, Luis Gustavopt_BR
dc.contributor.authorSchmidt, Joao Edgarpt_BR
dc.contributor.authorGeshev, Julian Penkovpt_BR
dc.date.accessioned2014-06-10T02:05:15Zpt_BR
dc.date.issued2011pt_BR
dc.identifier.issn0021-8979pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/96284pt_BR
dc.description.abstractThis paper reports experimental results obtained on an unconventional exchange bias (EB) system where the ferromagnetic layer, Ni0.75Cu0.25, has lower ordering temperature (TC) than that (TN) of the antiferromagnetic one, NiO, with emphasis on modifying EB through either magnetic annealing or light-ion irradiation. Samples were cooled from temperatures higher than TN or in between TC and TN to room temperature with magnetic field applied in different in-plane directions. Upon ion irradiation, magnetic fields, parallel or antiparallel to the orientation of the field present during the films deposition, were applied to explore different effects on EB. We found that the EB direction can be completely reversed by means of either annealing or ion bombardment; however, both postdeposition treatments provide very little variation of the EB field value over that produced during the film’s growth. The importance of the annealing field strength was also discussed. The results were interpreted based on a mechanism which assumes that the interfacial moments adjacent to the antiferromagnetic layer are responsible for establishing the exchange biasing in the paramagnetic state.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofJournal of applied physics. Vol. 109, no. 8 (Apr. 2011), 083938, 5 p.pt_BR
dc.rightsOpen Accessen
dc.subjectMateriais ferromagnéticospt_BR
dc.subjectMateriais antiferromagnéticospt_BR
dc.subjectMateriais paramagnéticospt_BR
dc.subjectCampos magnéticospt_BR
dc.subjectEfeitos de feixe iônicopt_BR
dc.subjectEsfriamentopt_BR
dc.subjectFilmes finos magneticospt_BR
dc.subjectPolarização por intercâmbiopt_BR
dc.subjectLigas de níquelpt_BR
dc.subjectLigas de cobrept_BR
dc.titleExchange bias in a ferromagnet/antiferromagnet system with TCTNpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000820510pt_BR
dc.type.originEstrangeiropt_BR


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