高密度磁記錄磁頭材料Fe-Co薄膜的微結(jié)構(gòu)和磁特性研究.pdf

1、中圖分類號：0469UDC：530訝I縮爭■刪罵c=l辟密級：學校代碼：碩士學位論文(高校教師)高密度磁記錄磁頭材料FeCo薄膜的微結(jié)構(gòu)和磁特性研究StudiesOnMicrostructuresandMagneticPropertiesofFe—CoThinFilmforHighDensityMagneticRecordingWrite—head作者姓名：指導教師：學科專業(yè)名稱：研究方向：論文開題H期：李秀玲郭革新教授凝聚態(tài)物理磁性薄

2、膜2007年6月10日二oo八年九月十日10094h事尤乒D4●AbstractWiththerapiddevelopmentofthehighdensityrecording，itisrequiredthatthemagneticheadmaterialshaveveryhighcoercivityandsaturationmagneticfluxdensityFeCoalloyshavebeenintensivelyinvestig

3、atedbecauseoftheirveryhighsaturationfluxdensitySputterdepositedFe—Cofilms，howevergenerallyshowhi曲coercivityandtheyarethereforenotapplicableastherightpolematerialsinamagneticrecordingheadInthisthesis，someseriesoffilmswere

4、preparedbydcmagnetronsputteringontoglasssubstratesatroomtemperatureMicrostructuresoffilmswereexaminedbyX—raydiffraction(XRD)Morphologiesanddomainstructureswereobservedbyscanningprobemicroscope(SPM)Andmagneticpropertieswe

5、remeasuredbyvibratingsamplemagnetometer(VSM)Theinfluenceofsputteringparameterontheirmicrostructureandmagneticpropertieswerestudied，respectively(1)FortheFesoC050(50nto)film，thecoercivityofthesamplereduceswiththesubstratet

6、emperatureincreasingThecoercivityreachestheminimum470efortheFesoCoso(50nm)filmatthesubstratetemperatureof500。CSPMimageshowsthesuperficialaverageroughnessincreaseswiththesubstratetemperatureincreasingThestrengthofthesampl

7、etestedbyXRDincreaseswiththesubstratetemperatureincreasing(2)ItisfoundthatfortheFesoCosofilmssample，whenfilmthicknesswaslessthan33nln，thecoercivityofFesoCosofilmsreduceswiththefilmthicknessesincreasing；Theminimumvalueofc

8、oercivityisobtainedwhenthethicknessofFe50C050filmswas250eWhenfilmthicknessexceedesthan33nnl，thecoercivityofFesoCosofilmsincreaseswiththefilmthicknessesincreasing；Thecoercivityreachesitspeakvalue1060ewhenitsthicknessis170

9、mmThestrengthofthepeakoftheXRDtestedsampleincreaseswiththethicknessofthefilmincreasing(3)FromthestudyofFe70C030filmsseries，itisfoundthatthecoercivityofthesampleincreasesgraduallywiththethicknesswhilethemagneticsaturation