Magnetische Messungen im Nahordnungsbereich vonHeusler-Phasen (Co,T)2 XY

Magnetic measurements onHeusler alloys (Co,T)₂XY (field and temperature dependence) are performed around theCurie points (temperature range:T_C–50 toT_C+50). A method otherwise used to get rid of ferromagnetic impurities only (_g versus 1/H plot) is applied to pure ferromagnets and yields completely new _g (extrap.) versusT curves with a maximumT_max>T_C. The method was applied to pure gadolinium first which has aCurie point within the accessible region of the susceptibility measuring device.