EFFECT OF PRESSURE ON CURIE TEMPERATURE OF ZRZN2

The initial pressure derivative of the Curie temperature of ZrZn2 has been measured under hydrostatic conditions, yielding a value of - (1.95±0.1)°K kbar-1 for a sample with a Curie temperature of (21.5±0.5)°K. This is in good agreement with the values of -1.8 and -2.4°K kbar-1 predicted by Wohlfarth using the model of a very weak itinerant ferromagnet and two different methods of calculation. The present measurement allows an estimate of the effective degeneracy temperature for ZrZn2 of 300°K and an estimate for the initial differential susceptibility of 6.2×10-5 emu g-1 Oe-1. © 1969 The American Physical Society.