简介：ThestructureandintrinsicmagneticpropertiesofRFeM（M=VorTi）,type1:12,havebeenstudiedbymagneticmeasurementandX-raydiffraction.Theyarebody-centeredtetragonalThMn12structure.Thechangesofcrystallatticeconstantscoincidewiththatoftheirelementradii.Curietemperatureisdecidedmainlybytheexchangeinteractionsof3d-3dand3d-4fatompairs.Thedataobtainedbymean-fieldapproximationagreewellwithexperimentalvalues.ThemagneticmomentcouplinginthesecompoundsforLREisferromagnetic,andforHREisantiferromagnetic.Atlowtemperature,anisotropyfieldisdecidedbyREsublattice.Inthispaper,theinfluenceofmagneticpropertiesofcobaltandnickelreplacingironhasalsobeenstudied.
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