Abstract
The diluted antiferromagnet Fe 0.2 Mg 0.8 TiO 3 has been investigated. The temperature variation of magnetization exhibits the spin-glass (SG)-like behavior, and the SG-freezing temperature T SG is estimated to be 6 K. On the other hand, the Mossbauer studies have demonstrated that the magnetically broadened spectrum appears superimposing upon the paramagnetic doublet already at ∼ 14 K, and as the temperature decreases the magnetic spectrum increases in relative intensity accompanying the decrease of the line width. In order to analyze the Mossbauer spectra from the dynamical aspect, we applied the stochastic treatment of relaxation phenomena formulated by Blume. Combining the results of the magnetization and Mossbauer measurements, it has been concluded that the SG-freezing in Fe 0.2 Mg 0.8 TiO 3 occurs among the “AF clusters” but not among individual spins.
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