| نویسندگان | M.Mozaffari, M.Eghbali Arani, J. Amighian |
|---|---|
| نشریه | J MAGN MAGN MATER |
| نوع مقاله | Original Research |
| تاریخ انتشار | 2010-11-01 |
| رتبه نشریه | علمی - پژوهشی |
| نوع نشریه | چاپی |
| کشور محل چاپ | هلند |
| نمایه نشریه | ISI |
چکیده مقاله
In thisworkzincferrite(ZnFe2O4) nanoparticleshavebeenpreparedbysol–gelmethodintwodifferent media,oneacidicandanotheronebasicandthenannealedatdifferenttemperaturesfrom350to 800 1C. XRDinvestigationsshowthatbothsampleshaveasinglephasespinelstructure.Mean crystallitesizesofthesampleswerecalculated,usingScherrer’sformula,whichare13and16nmfor the samplespreparedinacidicandbasicmedia,respectively.Thevariationofcationdistributioninthe sampleswasestimatedbytheratioof(220)and(222)intensitydiffractionpeaksandtheresults show thatas-preparednanoparticleshavedifferentionicdistributionsincomparisonwiththatofbulk zinc ferrite.Alsotheresultsshowthatbyincreasingannealingtemperaturetheionicdistributionofthe zinc ferritenanoparticlestendstothatofbulksample.Themagneticpropertiesofthesampleswere studiedbyVSMandtheresultsshowthatzincferritenanoparticleshaveaferrimagneticbehavior.Also the morphologyofthepowderswasexaminedbyTEM