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锌铁氧体纳米颗粒的结构与磁性研究(英文).docx

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锌铁氧体纳米颗粒的结构与磁性研究(英文) Title:StructuralandMagneticCharacterizationofZincFerriteNanoparticles Introduction: Nanoparticleshavereceivedsignificantattentioninrecentyearsduetotheiruniquesize-dependentphysicalandchemicalproperties.Zincferrite(ZnFe2O4)isonesuchmaterialthathasattractedinterestduetoitsdiverseapplicationsinvariousfieldsincludingbiomedicalsensing,catalysis,andenvironmentalremediation.ThestructureandmagneticpropertiesofnanoparticlesofZnFe2O4havebeenthesubjectofextensiveresearchduetotheirpotentialapplicationsinmagneticdatastorageandhigh-frequencydevices.ThispaperaimstoreviewrecentstudiesonthestructuralandmagneticcharacterizationofZnFe2O4nanoparticles. Structuralcharacterization: ThecrystallographicstructureofZnFe2O4nanoparticleshasbeeninvestigatedthroughvarioustechniques,includingX-raydiffraction(XRD),transmissionelectronmicroscopy(TEM),andRamanspectroscopy.XRDanalysisrevealedthattheZnFe2O4nanoparticleshaveaspinelstructure,withaface-centeredcubicunitcellandcellparameterofapproximately8.43Å.TEMimagingprovidedevidenceofwell-dispersedmonodispersenanoparticleswithsizesrangingfrom5to50nm.TheRamanspectrumofZnFe2O4nanoparticlesexhibitedcharacteristicpeaksataround650cm-1,attributedtothevibrationalmodesofthetetrahedralandoctahedralsitesinthespinelstructure. Magneticcharacterization: ThemagneticpropertiesofZnFe2O4nanoparticleshavebeenextensivelystudied,withtheaimofunderstandingtheirpotentialapplicationsinmagneticrecordingandhigh-frequencydevices.ThemagnetizationofZnFe2O4nanoparticleswasmeasuredusingvibratingsamplemagnetometry(VSM)andsuperconductingquantuminterferencedevice(SQUID).Bothtechniquesshowedaferrimagneticbehavioratroomtemperatureandexhibitedhysteresisloopswithnoremanenceorcoercivity,indicatingthatthenanoparticlesaresuperparamagnetic.ThemagneticmomentsoftheZnFe2O4nanoparticleswerefoundtobestronglydependentontheparticlesize,withsmallerparticlesexhibitinghighermoments.Thissizedependenceofmagneticpropertiescanbeusedinmagneticdatastorageapplications. Conclusion: ZnFe2O4