Magnetodielectric coupling in multiferroic transition metal oxides_2008_ThesisAdem.pdf

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1、MagnetodielectricCouplinginMultiferroicTransitionMetalOxidesCOVER:A2Dprojectionof3DplotofthedielectricconstantofY2Cu2O5asafunctionofthetemperatureandthemagneticfield,seeChapter3.Theworkdescribedinthisthesiswasperformedinthegroup“SolidStateChemistry”(partoftheZernikeInst

2、ituteforAdvancedMaterials)oftheUniversityofGroningen,TheNetherlands.Thisworkissponsoredbythe“StichtingvoorFundamenteelOnderzoekderMaterie”(FOM)whichisfinanciallysupportedbythe“NederlandseorganisatievoorWetenschappelijkOnderzoek”(NWO).PRINTEDBY:FACILITAIRBEDRIJFRUG,GRONI

3、NGEN.September2008.ISBNNo:978-90-367-3566-7ZernikeInstituteforAdvancedMaterialsPh.D.thesisseries2008-26ISSN1570-1530RIJKSUNIVERSITEITGRONINGENMagnetodielectricCouplinginMultiferroicTransitionMetalOxidesProefschriftterverkrijgingvanhetdoctoraatindeWiskundeenNatuurwetens

4、chappenaandeRijksuniversiteitGroningenopgezagvandeRectorMagnificus,dr.F.Zwarts,inhetopenbaarteverdedigenopvrijdag24oktober2008om14:45uurdoorUmutAdemgeborenop9juli1979teAnkara,TurkijePromotor:Prof.Dr.ThomasT.M.PalstraCopromotor:Dr.GraemeR.BlakeBeoordelingscommissie:Prof.

5、Dr.BerndBuchner¨Prof.Dr.TsuyoshiKimuraProf.Dr.CharlesSimonTomyparentsContents1.Introduction11.1.HistoricalDevelopmentoftheFieldofLinearMagnetoelectricsandMultiferroics..11.1.1.Multiferroics..................................11.1.2.LinearMagnetoelectrics.................

6、...........21.1.3.ExamplesofMultiferroicsandLinearMagnetoelectrics............41.1.4.MagnetodielectricCoupling..........................61.1.5.Two-phaseSystems...............................71.2.AspectsoftheCurrentTheoreticalUnderstandingofMagnetoelectricCoupling...81.

7、3.Motivationofthisthesis................................9Bibliography112.ExperimentalTechniques152.1.Synthesis........................................152.2.X-rayDiffractionExperiments.............................162.2.1.X-rayPowderDiffraction(XRPD).....................

8、..162.2.2.SingleCrystalX-rayDiffraction(SXD)....................162.3.MagnetizationMeasurements......................