Mn基合金薄膜的結(jié)構(gòu)和磁性.pdf

1、復(fù)旦大學(xué)博士學(xué)位論文Mn基合金薄膜的結(jié)構(gòu)和磁性姓名：吳鏑申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：凝聚態(tài)物理指導(dǎo)教師：金曉峰2001.4.1ABSTRACTnleresearchaboutultrathinmagneticfillhasmademuchprogressinrecentyearsbecauseof也edevelopmentoftheexperimenttechnologyandtheoryTheresearchofmagneticmetal

2、filmiSusefulbothtodeeplyunderstandtheinsideofmetalmagnetismandtoprovidethebaseofcommerciallyapplicationinmagnetoelectroniCSInthisthesis1mainlyintroduceOUrrecentWOrkaboutthepropertyoftheMnbasealloysfilmsgrowthonGaAs(001)s

3、urface，themagneticmetalultrathinfilmB卯d(100)depositedbypulselaserandtheformationofsurfaceorderedalloyofPddepositedonMo(100)surface1ThcepitaxycrystallinestructureandmagnetismofCoxMnIxalloysgrownonGaA酊001)havebeenstudiedth

4、eCorichfilmsarebodycenteredcubicstlxlctttreandferromagnetic，andtheMnrichonesalefacecenteredcubicstuctureandnoneferromagneticHoweverthefilmstructureandmagnetismat)Ⅲ5showstrongthicknessdependentbehaviorWi也thehelpofthecalcu

5、lationoffwstprineiDleSlincarizedaugmentedplanewave(LAPW)calculation，thecorrelationestablishedinexperimentbetween也estructureandmagnetismofCol《MnxalloysisbeRerunderstoodUsingthesynchroradiafionphotoelectronspectroscopymeas

6、urelnenl，thereiSstronginteractionbetweenCoandMn2TheepitaxycrystallinestructureandmagnetismofFeMnalloygrownonGaAs(001)havebeenstudiedr111efilmshavebodycentertetrahedron(bct)SRuctureandferromagneticwithperpendicularaulsotr

7、opyintheultrathinregiondifferentfrombulkFeMnalloyThecorrelationofstructureandmagnetismofFeMnalloyhasbeenfullerstudiedbyafirstprincipleLAPWcalculationwhichshOWSthebetstructurehasatendencytobeferromagneticandfccstructurete

8、ndtobeantiferromagnetic3TheepitaxyofFegrownonPd(1001surfacebypulselaserdepositionhasbeenstudiedItisfoundthatthegrowthattheinitialstageisinthelayer_bylayermodeandthefilmsiSinplaneanisotropygrownatroomtemperaturenlemagneti

9、smiSobservedevenat015MLandthesaturatemagnetizationofthefilmhasoscillationwi也thefilmthicknessThemaximumandminimummagnetizationiSat05M皿and16MLrespectively4貼eepitaxyofPd囂ownonMo(100)surfacehasbeenstudiedwithlOWenergyelectro

10、nmicroscopyanddiffraction，andfirstprinciplestotalenergycalculationsDepositionofPdatelevatedtemperaturelcadsinitiallytothedevelopmentofanintensec(2x21di衢actionpagemTheoreticalcalculationsdemonstratethatac(22、substitutiona