SPIN GLASS STATE OF MNXNI1-XSB - SYNTHESIS IN HIGH-PRESSURE AND HIGH-TEMPERATURE ATMOSPHERES

The solid solution between ferromagnetic MnSb and paramagnetic NiSb, MnxNi1- xSb (0≤ × ≤1.0), with NiAs structure was synthesized in high pressure and high temperature atmospheres. The decomposition temperature was determined to be 420~480 K. The critical concentration of ferromagnetism was obtained to be xc =0.65 at absolute zero. A new type spin glass state with double transition points, Tsg1 and Tsg2, was found in a wide range of 0.2≤x≤0.65 in the paramagnetic phase. The maximum transition point was estimated to be Tsg1=60 K and Tsg2=190 K. The electrical resistivity showed no anomaly corresponding to Tsg1 and Tsg2, and the temperature dependence in the spin glass state was given to be T2 and T3/2 at lower temperature. Some discussions are given for the experimental results. © 1978, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.