Low-temperature calorimetric study of SrTiO3

The specific heat of SrTiO 3 shows an anomaly at 105 K due to a structural transition from the tetragonal to cubic phase. The shape of the anomalous specific heat, Δ C p ( T ), measured previously using quasi-static conduction calorimetry is confirmed and compared with results from rapid AC calorimetry (scanning rate ~30 K h -1 ). The close agreement of both data sets proves that slow relaxational processes (e.g. the rearrangement of dense domain patterns) do not influence Δ C p ( T ) significantly in SrTiO 3 . Measurements at low temperatures do not reveal any further anomaly. The freezing temperature reported around 30 K due to quantum saturation of the order parameter does not produce any anomalous effect in the heat capacity.