Abstract
We report a theoretical investigation of the entropic barocaloric effect in a spin crossover system. From our model Hamiltonian, the total entropy, which includes the contributions from the lattice (vibrational), magnetic and configurational entropies, was obtained and worked out for a systematic study of the barocaloric effect. The barocaloric effect was parametrically investigated in three scenarios: second order, threshold of second-first order and first order phase transition. Besides, a procedure for obtaining the molecular volume change during the low spin to high spin phase transition conversion was proposed, through the entropic barocaloric measurements.
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