PRESSURE-INDUCED FERROMAGNETISM IN EUTE

The magnetic behavior of EuTe was investigated under various pressures up to 11.7 GPa and in the temperature range from 1.4 to 30 K by means of uniform magnetization measurements of extremely small samples in a diamond anvil cell. A pressure-induced transition from antiferromagne tic to ferromagnetic ordering was observed at a pressure of about 8 GP a. It was found that, at pressures below 8 GPa, the susceptibility chi =M/H at high temperatures increased with pressure due to the developme nt of the ferromagnetic interaction. At pressures just above 8 GPa, ch i(T) showed anomalous behavior resulting from strong competition of ma gnetic interactions below the critical temperature at which spontaneou s magnetization appeared. At pressures above 9 GPa, a ferromagnetic ph ase was established at low temperature and the Curie temperature incre ased with pressure.