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多铁材料铁酸铋(BiFeO3)的掺杂研究Bi1-xErxFe095Co0.pdf

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MaterialsLetters97(2013)56–58 ContentslistsavailableatSciVerseScienceDirect MaterialsLetters journalhomepage:www.elsevier.com/locate/matlet Structuralphasetransitionandmultiferroicpropertiesofsingle-phase Bi1xErxFe0.95Co0.05O3 WeiweiMaoa,b,Xing’aoLic,n,YongtaoLia,XiwangWangb,YufengWangd,YanwenMac, XiaomiaoFengc,TaoYangc,JianpingYanga,nn aSchoolofScience,NanjingUniversityofPostsandTelecommunications(NUPT),Nanjing210046,PRChina bSchoolofOpto-ElectronicEngineering,NanjingUniversityofPostsandTelecommunications(NUPT),Nanjing210046,PRChina cKeyLaboratoryforOrganicElectronicsandInformationDisplays(KLOEID),InstituteofAdvancedMaterials(IAM),NanjingUniversityofPostsandTelecommunications(NUPT), Nanjing210046,PRChina dSchoolofTelecommunicationsandInformationEngineering,NanjingUniversityofPostsandTelecommunications(NUPT),Nanjing210046,PRChina articleinfoabstract Articlehistory:Inthispaperwereportthestructural,magnetic,andferroelectricpropertiesofBi1xErxFe0.95Co0.05O3 Received3November2012(x¼0,0.05,0.10,and0.15)samplespreparedbythesol–gelmethod.X-raydiffractionanalysisrevealed Accepted24January2013aphasetransitionfromrhombohedraltoorthorhombicstructurewith15%Erdoping.Thisstructural Availableonline31January2013 phasetransitionresultedinthesignificantlyimprovedmagneticproperties(Ms¼1.963emu/gat Keywords:70kOe).TheleakagecurrentdecreaseswiththeincreasingErconcentration.Andthemostpronounced 2 BiFeO3polarizationhysteresisloopswereobservedatx¼0.10,givingahighProf18.5mC/cm(underabout Sol–gelpreparation7kV/cm).However,theferroelectricpropertiesdramaticallydecreasedatx¼0.15duetothestructural Multiferroicphasetransition. Ferroelectric &2013ElsevierB.V.Allrightsreserved. Magnetic 1.IntroductionPrandCr[13],BaandMn[14],SmandMn[15],etc.)havebeen provedtomodifythemultiferroicpropertiesofBFOeffectively. Multiferroicmaterials,whichexhibitsimultaneousanti/ferro-Toourknowledge,thereisnoreportonErandCocodoped magneticandferroelectricorderswithinthesamephase,areofBFO.Togetinsightintotheef