聚丙烯溶膠凝膠法合成A位摻雜BiFeO3材料性能研究.pdf

1、J“兩師范大學(xué)碩士畢業(yè)淪文聚丙烯溶膠凝膠法合成A位摻雜BiFe03材料性能研究專業(yè)名稱：原子與分子物理申請人：黃康玲指導(dǎo)教師：何云教授論文答辯委員會委員：一鲞J。西師范大學(xué)碩十畢業(yè)論文——_———————————_●—●—●_—●—____—’_—————————————————————————————，—————___●，_—___————————————●●●____—__—————————，——______————————————

2、———————一一StlIdyoftheperformanceofBiFe03materialsAsitedopingpreparedbypolypropylenesol—gelmethodPostgraduatestudent：Kan91ingHuangSupervisor：Profly|unHeSpeciali毋：AtomicandMoleculePhysicsDirection：MaglleticmaterialsGrade：20

3、12AbstractFoundingofmultife11roicmaterialswithm孵leticeffectmal【esitpossibletodesi星皿newmemo巧Astheonlyroomtemperatl_lremultiferroicmaterial，BiFe03hasmagnetoelectriceffectduetoitshowsfe11roelectricorderinga11dfe11romagnetic

4、orde血g，thereareawideraIlgeof印plicationprospectsHoweVer’itstillhassomedi氆cultiesinpraI：tical印plicationsOntheonehand，altllou曲BiFe03belongstospacegroup(R3c)andallowsexistingweakferromagnetism，butithasaG—t)，peantiferromagnet

5、ics仇Jc“l(fā)re，a11dshows62mcycleofaIltiferromaglleticspacesp油1s咖cture，itsresidualm≯卯etismisve巧weak，thismakesBiFe03h砌lye】【hibitmagneticonthemacrosc叩icOntheotherhand，duetotheBielementsisrerelativelVeasvtoVolatileduringsynthesi

6、saIldFeValencenuctIlation，leadingtohesyntheticmaterialscontainingoxygenVaCancies，Miscellalleousphasedefects，mal(esitdi伍culttopreparepurephaseBiFe03andthereisa1a瑪eleakagecunent，thiss甜esofproblemshaverestrjctedthepotential

7、applicationsofthissingle—phasemultiferroicmaterialsAtpresent，therearemanygroupshasstlldiedthepropeniesofBiFe03whichwasdopedwithanelementonA—sitesorBsites，ittumsoutthatdopedonA／BsitesjsaneffectivemetllodtoimproVementtheph

8、ysicalpropeniesHowever，therearelittlegroupshasstudiedthepropertiesofBiFe03whichwasdoubledopedwithdi行erentelementsonlyonAsitesorBsitesmthjspaperwehavemainlystudytllef打oelectricmagneticpropeniesofBiFe03wllichwaSsiIlgledope

9、dbyamdineeanhionsordoubledopedonAsitesThemaincontentsareasfollows：1Sr2ionswaSasubstituteforBi3ions，resultingindistonionofcrystalstmctl鵬system，itshowedthatmeXRDdi脅ctionpeakswaSmergednesc猢她elec廿onmicroscopyshowedmatwhenthe