Exchange bias in a columnar nanocrystalline Ni80Fe20/CoO thin film

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dc.contributor.authorvan Lierop, Jen_AU
dc.contributor.authorSouthern, BWen_AU
dc.contributor.authorLin, KWen_AU
dc.contributor.authorGuo, ZYen_AU
dc.contributor.authorHarland, CLen_AU
dc.contributor.authorRosenberg, RAen_AU
dc.contributor.authorFreeland, JWen_AU
dc.date.accessioned2008-02-13T05:16:03Zen_AU
dc.date.accessioned2010-04-30T05:01:51Zen_AU
dc.date.available2008-02-13T05:16:03Zen_AU
dc.date.available2010-04-30T05:01:51Zen_AU
dc.date.issued2007-12-28en_AU
dc.date.statistics2007-12en_AU
dc.description.abstractThe effects of interfacial coupling at the boundary of ferromagnetic and antiferromagnetic components in a nanoscale columnar-structured thin film of Ni80Fe20/CoO have been examined. Field-cooling the film results in very different temperature dependences of the enhanced coercivity and exchange-bias shift of the hysteresis loop. The exchange-bias temperature dependence is well described by thermal fluctuations of the interfacial spins while the coercivity temperature dependence indicates that single-domain-like columns are being coherently rotated by the thermal fluctuations of the interface spins. Furthermore, only a portion of the spins in the antiferromagnetic layer seem to be associated with the spin coupling that results in exchange bias. X-ray magnetic resonant scattering measurements show clearly the presence of canted Co interfacial moments that provide a local field which enables exchange bias at a significantly higher temperature than the onset of an enhanced coercivity. © 2007, American Physical Societyen_AU
dc.identifier.articlenumber224432en_AU
dc.identifier.citationvan Lierop, J., Southern, B. W., Lin, K. W., Guo, Z. Y., Harland, C. L., Rosenberg, R. A., & Freeland, J. W. (2007). Exchange bias in a columnar nanocrystalline Ni80Fe20/CoO thin film. Physical Review B, 76(22), 224432. doi:10.1103/PhysRevB.76.224432en_AU
dc.identifier.govdoc1109en_AU
dc.identifier.issn1098-0121en_AU
dc.identifier.issue22en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.76.224432en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/993en_AU
dc.identifier.volume76en_AU
dc.language.isoenen_AU
dc.publisherThe American Physical Societyen_AU
dc.subjectAntiferromagnetic materialsen_AU
dc.subjectAnisotropyen_AU
dc.subjectSpinen_AU
dc.subjectNanostructuresen_AU
dc.subjectTemperature rangeen_AU
dc.subjectAsymmetryen_AU
dc.subjectFerromagnetic materialsen_AU
dc.subjectThin filmsen_AU
dc.titleExchange bias in a columnar nanocrystalline Ni80Fe20/CoO thin filmen_AU
dc.typeJournal Articleen_AU
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