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26920069PHYSICSEXPERIMENTATIONVol.26No.9Sep.,2006:2006205212;;:2006207208:(1965-),,,,,.1,2,1,2,2,2(1.,475004;2.,200433):,,.:;;;;:O441.6:A:100524642(2006)092000320411877JohnKerr,,.1985MoogBader,1,SMOKE(surfacemagneto2opticKerreffect),.,.SMOKE1,,,..2SMOKE,,.,,K,,1.,,ps,,,,K,.1,3:a.,;b.,,;c.,,.,..SMOKE,.,,.(2),.,,.,.2,I0.,,.2,,..,.1,p,Ep,,EpEs,2,EsnEp.:EsEp=K+iK.(1):I=|Epsin+Escos|2.(2)(1)(2):I=|Ep|2|sin+(K+iK)cos|2.(3),sin,cos1,:I=|Ep|2|+(K+iK)|2.(4),,mK,KK,,(4),(4):I=|Ep|2(2+2K).(5),I0=|Ep|22,(6):I=I01+2K.(7)(7)K:K=2I-I0I0.(8)+K-K,K=12(+K--K)=4I(+BS)-I(-BS)I0=4II0,(9)(9),I(+BS)I(-BS).(9),IK,K.1.K,1/4,/2,i(K+iK)=-K+iK,K+iK,.KK=12(-K-+K)=4I(-BS)-I(+BS)I0=-4II0,(10)+K,-K.3(3):1).2),.2,.3)..4).a.,.b.4263SMOKE.c..5).,A/D,.D/A20s,40s,80s,.6).VisualC++.,D/A.A/D,.Fe,Co,Ni.4,2.H,B.,I.,KKB,,B.I2H,B2H,B2H,B2H.:1).,,.,CT5A,,H.2)2.2,,.0.01mm,1,.3)21/4.,p,,1/4.21/4.4).,(),SMOKE,.5).,.6).p,,,,.22.,.,,I(+BS)I(-BS).I0=I(+BS)+I(-BS)2,I=I(+BS)-I(-BS).,I0,I(9)K.7).59,:1/4,1/4.SMOKE,6),(10)K.5,,,4.1,1.689.41I(+BS)/VI(-BS)/VI0/VI/V/()K/()2.021.001.511.02101.6896,,SMOKE,,,,,.SMOKE,.:[1]QiuZQ,BaderSD.Surfacemagneto2opticKerreffect[J].JournalofMagnetismandMagneticMa2terials,1999,200:664678.[2].[M].:,2004.[3].[M].:,2005.Magnetichysteresisloopoftheferromagneticfilmmeasuredbyusingthetestsystemofsurfacemagneto2opticKerreffectLIUPing2an1,2,DINGFei1,2,CHENXi2jiang2,LUShen2long2(1.TeachingCenterforFundamentalExperiment,HenanUniversity,Kaifeng475004,China;2.DepartmentofPhysics,FudanUniversity,Shanghai200433,China)Abstract:Usingthetestsystemofsurfacemagneto2opticKerreffect,amodernphysicsexperi2mentisdesignedanddevelopedwiththepurposeoftheexploringstudy.Themagnetichysteresisloopsofferromagneticfilmsareplotted,andKerrangleandKerrellipticityaremeasured.Keywords:surfacemagneto2opticKerreffect;ferromagneticfilm;magnetichysteresisloop;Kerrangle;Kerrellipticity626