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Temperature dependence of the real component of ac susceptibility for measured at different frequencies. The frequency dependencies of the dynamic spin freezing temperature plotted as vs and vs are shown in the inset (a) and the inset (b), respectively.
Time dependence of magnetization of , plotted as vs , measured at 5 K in magnetic field of 6.0 kOe. The solid line represents least squares fit using equation . The inset displays the data up to 115 kOe measured at 5 K.
Comparison of the low-temperature FC (open symbols) and ZFC (filled symbols) susceptibilities for measured in various magnetic fields. The inset shows the field dependence of the characteristic temperature (from where magnetic irreversibility occurs), plotted as vs .
Temperature dependence of specific heat of between 1.7 and 40 K. Inset (a): temperature dependence of electrical resistivity of between 4.2 and 240 K. Inset (b): specific heat data of plotted as vs .
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