Low-temperature heat capacity and Schottky anomaly of ErVO4

The heat capacity of erbium orthovanadate was studied by adiabatic calorimetry in the temperature range 5–340 K. The smoothed temperature dependences of the thermodynamic functions in the given temperature range and the Gibbs energy of formation of ErVO4 under the standard conditions were calculated from the experimental and literature data. The anomalous heat capacity related to the separation of the Stark electronic levels under the action of the crystal field was evaluated.