Thermal Properties of (Ti_0.99V_0.01)₂O₃: a Spin Glass

Abstract

Specific heat of (Ti 0.99 V 0.01 ) 2 O 3 single crystal was measured in the temperature range from 0.3 to 4.5 K. An anomaly in the specific heat was not found clearly at the spin glass ordering temperature T g (0.45 K), but the rate of entropy change showed a peak at the T g . From this behavior, the spin glass freezing in (Ti 0.99 V 0.01 ) 2 O 3 appears to be a higher order phase transition.