PRESSURE-INDUCED ANTIFERROMAGNETISM IN (FE1-XNIX)(49)RH-51 ALLOYS

The (Fe1-xNix)(49)Rh-51 ordered alloys exhibit at ambient pressure the phase transition from ferromagnetic to antiferromagnetic state for x ranging from 0 to 0.036. The changes in the electrical resistivity acc ompanying the magnetic phase transition in the alloys with x=0.025, 0. 040, 0.045, 0.050 were investigated under hydrostatic pressure up to 1 3 kbar in a temperature region from 10-300 K. The phase transition fro m ferromagnetic to antiferromagnetic state was induced by pressure of about 1, 2, and 12 kbar for the compounds with x=0.040, 0.045 and 0.05 0, respectively. The temperature of the phase transition significantly increases with pressure. The magnetic x-P-T-phase diagram is presente d for the studied alloys.