MgO單晶點(diǎn)缺陷的X射線漫散射研究.pdf

1、聲明本學(xué)位論文是我在導(dǎo)師的指導(dǎo)下取得的研究成果，盡我所知，在本學(xué)位論文中，除了加以標(biāo)注和致謝的部分外，不包含其他人已經(jīng)發(fā)表或公布過的研究成果，也不包含我為獲得任何教育機(jī)構(gòu)的學(xué)位或?qū)W歷而使用過的材料。與我一同工作的同事對本學(xué)位論文做出的貢獻(xiàn)均己在論文中作了明確的說明。研究生簽名：堡罐籃芻弘f籮年。弓月巧目學(xué)位論文使用授權(quán)聲明南京理工大學(xué)有權(quán)保存本學(xué)位論文的電子和紙質(zhì)文檔，可以借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容，可以向有關(guān)部門或機(jī)構(gòu)送

2、交并授權(quán)其保存、借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容。對于保密論文，按保密的有關(guān)規(guī)定和程序處理。研究生簽名：ⅦS年嗎月巧日AbStract碩士學(xué)位論文AbstractdufenIomagneticsemiconductorseemsmostlikelytobeappliedinspintronicsdeViceduetoitsferromagnetismathightemperatllre，hascausedwidespreadre

3、searchGenerally，thiskindofmagnetismisconsideredtocome矗omthedefectsinmaterial，butsystemicquantitatiVelystudyontherelationshipbetweendumagnetismanddefectsisseldomc枷edoutResearchresultsshowedthatMgOsinglecr)，stal嘶tlldefects

4、presenteddufe玎omagnetismThesimplefacecenteredcubiccrystalstmctureofMgOsinglecrystalhelpspeoplecompletelycharacterizeitsdefectconfi母lrationTherefore，thedetailedpointdefectconfigurationcombined謝thmagneticpropeniesishelp如lt

5、eVealthemechaJlismofdofeHomagnetismInthispaper，pointdefectsco而gurationofi仃adiatedMgOsinglecrystalwaSinvestigatedbymeaIlsofX—raydi肌sescatte血gtechlliqueApplyingtheobtainedXraydi筋sescatteringimensit)，fomlulabasedonthetheo巧o

6、f1anicedyn觚lics，wecalculatedtheXraydi婦陬Sesc抵ringintens時(shí)cauSedbysinglecrystalcubicdefectSanddouble—forCedefectsinMgOsinglec巧stalHighquali夠(OO1)orientedMgOsinglec巧stalaReri11radiationtreatmentbybuCowithdoseoflOOkGy，150kGya

7、Ild200kGywasusedinthispaperThemeaSurementofXraydifmsescatteringintens時(shí)neart11e200aIld31lreciprocallatticepointofMgOsinglecr)，stal、Vasca玎iedoutatBeijingSynchrotronRadiationFacil時(shí)difmsescatteringstationatdi毹renttemperature

8、Co玎elationanalysisofmeasuredreciprocalSpacemappingandcalculatedXraydifmsescatteringintensi夠distributioncurveshowedthat：(1)Theexperimentalradialscatteringintensi夠distributioncurvenearthe【200】and[311】reciprocalVectorsindic

9、atedweal(erBraggpeal(ofMgOsin91ecrystalasthei玎乏ldiationdoseincreased，wIlichmeansthatthei11raIiiation仃eatmentinduceddefectst0reducetheperfectionoflattice(2)Braggdi所actionaIlgleofinadiatedMgOsinglec巧stalbecomessmallerindic

10、atiVeof1a瑪er1atticeparanleterThe(311)difhactionpeakofirradiatedMgOsinglec巧stal謝mthedoseof200kGyhasbeensplit，implyingthefonIlationoftheconlplexdefectsXraydifmsescatteringmainlyrenectweal(distortionzoneIntheweakdistonionzo

11、ne，thelatticeparameterbecomesla略erduetointerstitialatoms(3)Thereciprocalspacemappingof200fitsweUwiththecalculationoft11edi伍Jsescatteringintensit)rcurveofdoubleforcedefects，indicatingthatsplitinterstitialatomswerein仃oduce