多铁性锰氧化物的磁场和电场的响应_2008

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1、MagneticandElectricResponseinMultiferroicManganitesCOVER:MagneticfielddependenceofthecapacitanceofTb0:98Ca0:02MnO3forEkcandHkbattemperaturesclosetotheferroelectrictransitionTheworkdescribedinthisthesiswasperformedinthegroup“SolidStateChemistry”(partoftheZer

2、nikeInstituteforAdvancedMaterials)oftheUniversityofGroningen,TheNetherlands,withfinancialsupportprovidedbyanUbboEmmiusScholarshipforPhDResearch.PRINTEDBY:FACILITAIRBEDRIJFRUG,GRONINGEN.November2008.ISBNNo:978-90-367-3673-2ZernikeInstituteforAdvancedMaterial

3、sPh.D.thesisseries2008-28ISSN1570-1530RIJKSUNIVERSITEITGRONINGENMagneticandElectricResponseinMultiferroicManganitesProefschriftterverkrijgingvanhetdoctoraatindeWiskundeenNatuurwetenschappenaandeRijksuniversiteitGroningenopgezagvandeRectorMagnificus,dr.F.Zwa

4、rts,inhetopenbaarteverdedigenopvrijdag5december2008om11.00uurdoorNandangMuftigeborenop15augustus1972teGarut,Indonesie¨Promotor:Prof.dr.T.T.M.PalstraCopromotor:Dr.A.A.NugrohoBeoordelingscommissie:Prof.dr.ir.P.H.M.vanLoosdrechtProf.dr.D.I.KhomskiiProf.dr.J.A

5、artsTomyparentsandmywifeRahmatunNisaContents1Introduction11.1Multiferroics,linearmagnetoelectricsandmagnetodielectrics.............11.2Briefoverviewofmultiferroics.............................31.3PhasediagramofRMnO3................................91.4Aimso

6、fresearch....................................10Bibliography112Experimentaltechniques152.1Singlecrystalpreparation................................152.1.1Feedrodpreparation..............................152.1.2Crystalgrowthinfloatingzonefurnace................

7、....162.2Structuralcharacterization...............................172.2.1X-raypowderdiffraction...........................172.2.2SinglecrystalX-raydiffraction(SXD)....................182.3Measurementofphysicalproperties..........................192.3.1Magn

8、etizationmeasurements.........................192.3.2Capacitancemeasurements..........................192.3.3Pyroelectriccurrentmeasurements......................202.4Singlecrystalneutrondiffraction..........