Relaxation of the field-cooled magnetization of an Ising spin glass

The time and temperature dependence of the field-cooled magnetization of a three-dimensional Ising spin glass ${\mathrm{Fe}}_{0.5}{\mathrm{Mn}}_{0.5}{\mathrm{TiO}}_3$ has been investigated. The temperature and cooling rate dependence is found to exhibit memory phenomena that can be related to the memory behavior of the low frequency ac susceptibility. The results add some further understanding on how to model the three-dimensional Ising spin glass in real space.