First orderreversalcurveinvestigationofthehardandsoftmagnetic phases ofannealedCoFeCunanowirearrays

Authorsمحمد الماسی کاشی-عبد العلی رمضانی-الهام گل افشان -منا عارف پور -الهام جعفری خمسه
JournalPHYSICA B
Paper TypeFull Paper
Published At۲۰۱۳-۷-۰۱
Journal GradeISI
Journal TypeTypographic
Journal CountryIran, Islamic Republic Of
Journal IndexISI ,SCOPUS

Abstract

(CoFe)1xCux (x¼0.12–0.84) nanowirearrayswereac-pulseelectrodepositedintoanodicaluminum oxidetemplates.TheelectrodepositionwasperformedinaconstantelectrolytewhileCucontentwas controlled byoff-timebetweenpulses.Nanowireswith30nmdiameterandthecertainlengthswiththe both bcc-CoFeandfcc-Cuphaseswereobtained.Magnetizationandcoercivityofthenanowires decreased withincreasingtheCucontent.Annealingimprovedthecoercivityandaremarkableincrease in magnetizationofnanowireswithhighCucontentswasobserved.Atwo-phasetreatmentwasseenfor annealed sampleswithhighCucontents.Firstorderreversalcurvesshowedahardmagneticphasewith almost constantmagneticpropertiesandcoercivityof 2500Oe.Theresultsshowedthatmainsourceof the variousmagneticbehaviorsofthesamplesmaybeattributedtoincreaseinsoftmagneticphase. A singledomaintreatmentwithanarrowinteracting field andcoercive field distributionswasalso observed fortheannealedsampleswithhighCucontent.