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| Research of Colossal Magnetoresistance in La_(0.67)Ca_(0.33)Mn_(1-x)Cr_xO_3 (0.00x0.15) | |
| 作者姓名： | 刘宁 孙勇 |
| 作者单位： | Structure Research Laboratory，University of Science and Technology of China，Hefei 230026，China，Department) of Physics，Suzhou College，Suzhou 234000，China，Structure Research Laboratory，University of Science and Technology of China，Hefei 230026，China |
| 基金项目： | ProjectsupportedbytheNationalNaturalScienceFoundationofChina ( 1993 40 0 3 )andtheResearchFundfortheDoctoralProgramofHigherEducation |
| 摘 要： | Inthelastfewyears ,agreatdealofworkhasbeendevotedtothemixed valencemanganitesLn1-yAyMnO3(Ln =rareearthelements ,A =Ca ,Sr ,Ba)exhibitingcolossalmagnetoresistance (CMR ) [1～ 3] .Aprominentfeatureofthesematerialsisametallic insu latingtransitionassociatedwiththeferromagnetic paramagnetictransition .Earlyworkhadrevealedthesignificanceofthedouble exchangeinteractionthroughMn3 O Mn4 networkintheclosecorrelationbe tweenthetransportandthemagnetism[4 ,5] .However ,recentdetailedstudieshaves… |
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