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dc.contributor.authorGraff, Ismael Leandropt_BR
dc.contributor.authorGeshev, Julian Penkovpt_BR
dc.contributor.authorTeixeira, Sergio Ribeiropt_BR
dc.contributor.authorAmaral, Liviopt_BR
dc.contributor.authorTraverse, Agnespt_BR
dc.date.accessioned2014-06-06T02:06:26Zpt_BR
dc.date.issued2008pt_BR
dc.identifier.issn0021-8979pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/96103pt_BR
dc.description.abstractThe effects of Kr ion irradiation of FexCo1−x /Cu multilayers are investigated by means of magnetic and x-ray measurements. The irradiation was performed at room temperature with 600 keV of Kr, and the fluences were ranged from 1x1015 to 5x1015 ions/cm². X-ray diffraction patterns show that the irradiation was able to produce a significant grain growth and, at the same time, it triggered a strain release. The x-ray absorption measurements around Fe K edge have shown that the FeCo environment changed from bcc, for the as-deposited multilayer, to fcc after appropriate fluence, depending on the Cu thickness and on the Fe/Co content. For 50 Å of Cu, the phase transformation occurs even for the lowest fluence, regardless the Fe/Co concentration. For 25 Å of Cu, it depends on the Fe/Co concentration. After irradiation, the saturation magnetization suffers a strong decrease, especially for 50 Å of Cu. The temperature for the onset of irreversibility also decreases with irradiation, again being the effect stronger for 50 Å of Cu. These data indicate that Kr irradiation induced mixing between Cu and FeCo, even though Cu is immiscible with Fe and Co in the equilibrium state.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofJournal of applied physics. Melville. Vol. 103, no. 3 (Feb. 2008), 033505 11p.pt_BR
dc.rightsOpen Accessen
dc.subjectIrradiacaopt_BR
dc.subjectCriptoniopt_BR
dc.subjectMulticamadas magnéticaspt_BR
dc.titleAtomic level mixing induced by Kr irradiation of FeCo/Cu multilayerspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000630111pt_BR
dc.type.originEstrangeiropt_BR


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