Simple derivation of the frequency dependent complex heat capacity

Jean-Luc Garden (1)

1 NEEL - Institut Néel

This paper gives a simple derivation of the well-known expression of the frequency dependent complex heat capacity in modulated temperature experiments. It aims at clarified again that the generalized calorimetric susceptibility is only due to the non-equilibrium behaviour occurring in the vicinity of thermodynamic equilibrium of slow internal degrees of freedom of a sample when the temperature oscillates at a well determined frequency.

Mots clés: Relaxation time constants; ac-calorimetry; Complex heat capacity; Internal degree of freedom; Relaxation time constants.

Domaines: Autre [cond-mat.other]

Jean-Luc Garden. Simple derivation of the frequency dependent complex heat capacity. Thermochimica Acta, 2007, 460, pp.85-87. ⟨10.1016/j.tca.2007.05.010⟩. ⟨hal-00158026⟩