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1、SolidStateSciences8(2006)908915www.elsevier.com/locate/ssscieNanosizeferritesobtainedbyballmilling:Crystalstructure,cationdistribution,size-strainanalysisandRamaninvestigationsZeljkaCvejica,∗,SrdjanRakica,AleksandarKremenovicb,c,BratislavAnticc,CedomirJovalekicd,PhilippeColombaneaInstituteofPhys
2、ics,FacultyofNaturalSciences,UniversityofNoviSad,TrgD.Obradovica6,21000NoviSad,SerbiaandMontenegrobLaboratoryforCrystallography,FacultyofMiningandGeology,UniversityofBelgrade,POB162,11001Belgrade,SerbiaandMontenegrocCondensedMatterPhysicsLaboratory,TheVincaInstitute,POB522,11001Belgrade,Serbiaan
3、dMontenegrodCenterforMultidisciplinaryStudies,UniversityofBelgrade,KnezaViseslava1,11000Belgrade,SerbiaandMontenegroeLADIR,UMR7075CNRS,andUniversitéPierreandMarieCurie,94230Thiais,FranceReceived3January2006;accepted22February2006Availableonline11May2006AbstractSpinelssamplesFe2.85Y0.15O4(S1)andF
4、e2.55In0.45O4(S2),suchasFe3O4+γ-Fe2O3(S3)wereobtainedbyballmilling.TEMmicrographaswellasXRPDlinebroadeninganalysesshownanosizenatureoftheferritepowders.Cationdistribution,foundbyRietveldrefinementofthesiteoccupancies,indicateY3+ionspresenceat16dsitesinFe2.85Y0.15O4,andarandomIn3+ionsdistributiono
5、nboth8aand16dsitesinFe2.55In0.45O4(spacegroupFd3¯m).FromtheXRPDlinebroadeninganalysiscrystallitesizeandstrainvaluesweredetermined.Thecrystallitesizeandstrainanisotropyissignificant,especiallyforFe2.85Y0.15O4andFe2.55In0.45O4.Thisresultisdiscussedregardingtheinfluenceofthecationsubstitutions.TheRam
6、ansignatureconfirmsthespinelstructureandthehomogeneityoftheparticles.©2006ElsevierSAS.Allrightsreserved.Keywords:Spinelferrites;Mechanochemicaltreatment;Rietveldsanalysis;Ramanspectra1.Introductiontantisthepossibilitytocontrolparticlesizeandparticlesizedistributionduringsynthesis.Inthelastdecade,
7、mechanochem-Theinterestformagneticmaterialsonnanoscaleperma-istrywasfrequentlyusedtoproducedifferentnanosizecom-pounds.Dependingonthesystemandtheappliedconditions,nentlyincreasesbecausetheypossesuniquemagnetic,chem-solidstat
