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Nanoparticle magneticmaterialsaresuitableformultiplemodernhighendmedicalapplicationsliketargeteddrugdelivery,genetherapy,hyperthermiaandMRthermometryimaging.Majorityoftheseapplications areconfined touseofMn–Zn ferritenanoparticles.Thesenanoparticlesarenormallyleftinthe bodyaftertheirrequisiteapplication.Preparingthesenanoparticlesisusuallyamuchinvolvedjob.HoweverwiththedevelopmentofthesimpletechniqueMnxZn1xFe2O4 nanoparticles couldbepreparedwith muchease.ThenanoparticlesofMnxZn1xFe2O4 with (x¼1.0,0.7,0.5,0.3,0.0)werepreparedandirradiatedwithgammaradiationofvariousintensitiesrangingbetween500Rto10,000R,afterap-propriatestructuralandmagneticcharacterization.Irradiatedsampleswereinvestigatedforstructuraland magneticproperties,aswellasforstructuralstabilityandcationdistribution.Theirradiatednanoparticlesexhibitedstructuralstabilitywithvariedcationdistributionandmagneticproperties,dependentongammaradiationdose.Surprisinglysamplesalsoexhibitedquenchingoflatticeparameterandparticlesize.Thechangesintroducedinthecationdistribution,latticeconstant,particlesizeandmagneticpropertieswerefoundtobeirreversiblewithtimelapseandwereofpermanentnatureexhibitinggoodstabilityevenafterseveralmonths.Thustheusefulpropertiesofnanoparticlescouldbeenhancedonmodifyingthecationdistributioninsidethenanoparticlesbyapplicationofgammaradiation.
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