30 مهر 1398
محمود ناصري

محمود ناصری

مرتبه علمی: دانشیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک-نانو
تلفن: 08132355404
دانشکده: علوم پایه

مشخصات پژوهش

عنوان
Synthesis and characterization of manganese ferrite nanoparticles by thermal treatment method
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Manganese ferrite Nanoparticle Thermal treatment Magnetic property
سال
2011
مجله JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
پژوهشگران محمود ناصری

چکیده

Cubic structuredmanganeseferritenanoparticlesweresynthesizedbyathermaltreatmentmethod followedbycalcinationatvarioustemperaturesfrom723to873K.Inthisinvestigation,weused polyvinylpyrrolidon(PVP)asacappingagenttocontroltheagglomerationofthenanoparticles.The characterizationstudieswereconductedbyX-raydiffraction(XRD)andtransmissionelectron microscopy(TEM).Theaverageparticlesizesofmanganeseferritenanoparticlesweredeterminedby TEM, whichincreasedwiththecalcinationtemperaturefrom12to22nmandtheyhadgood agreementwithXRDresults.Fouriertransforminfraredspectroscopyconfirmedthepresenceofmetal oxide bandsatalltemperaturesandtheabsenceoforganicbandsat873K.Magneticpropertieswere demonstratedbyavibratingsamplemagnetometer,whichshowedasuper-paramagneticbehaviorfor all samplesandalsosaturationmagnetization(Ms) increasesfrom3.06to15.78emu/gbyincreasing the calcinationtemperature.Themagneticpropertieswerealsoconfirmedbytheuseofelectron paramagneticresonancespectroscopy,whichrevealedtheexistenceofunpairedelectronsandalso measuredpeak-to-peaklinewidth,resonantmagneticfieldandthe g-factor.