Abstract
We use torque measurements to determine the field dependence of the spin-glass freezing temperature in alloys doped with gold impurities. We find that by increasing the concentration of gold, and thus enhancing the random anisotropy forces, the transition line changes from Gabay-Toulouse-like to de Almeida-Thouless-like. This change to an Ising behavior is an agreement with the predictions of the mean-field model of Kotliar and Sompolinsky for a Sherrington-Kirkpatrick spin glass with random anisotropy.
- Received 3 July 1984
DOI:https://doi.org/10.1103/PhysRevB.30.6791
©1984 American Physical Society