Calorimetric investigations of scaling behavior in aluminosilicate spin glasses

Detailed heat-capacity measurements on Co and Mn aluminosilicate spin glasses have been performed in magnetic fields from 0 to 2 T. The decrease in the specific heat in the vicinity of the freezing temperature with the application of a magnetic field is described in terms of a scaling relation with scaling exponents of $\beta =1.1\mathrm{}\pm 0.1$ and $\gamma =3.5\mathrm{}\pm 0.2$ for the Co glass, and $\beta =1.1\mathrm{}\pm 0.1$ and $\gamma =3.8\mathrm{}\pm 0.2$ for the Mn glass. These values are in good agreement with values determined from magnetization and susceptibility studies.