LOW-TEMPERATURE MAGNETIZATION JUMPS IN DY(FE,M)(2) (M=AL,SI,GA) AND SM(CO,NI)(5)

Low temperature hysteresis magnetic properties of Dy(Fe,M)(2) (M=Al, S i, Ga) and Sm(Co,Ni)(5) have been studied. The staircase character of magnetization and demagnetization curves observed al T < 10 K has been shown to be due to a sharp increase in the sample temperature under t he heat released at irreversible domain walls motion. Essential condit ions for observation of the low temperature magnetization jumps have b een formulated for the samples possessing the usual temperature depend ences of both coercive force and heat capacity.