Ferromagnetic proximity effect on the thermodynamic properties of topological crystalline insulator SnTe (001) and related thin films

•The thermodynamic properties in the topological crystalline insulator (TCI) SnTe (001) and its thin film (TCITF) is investigated.•TCI (TCITF) possesses a gapless (gapped) phase.•The electronic heat capacity (EHC) in TCI is larger than that of TCITF.•The Pauli spin paramagnetic susceptibility in TCI is smaller than that of TCITF due to the inherent hybridization potential in TCITF.•The band gap in TCI opens with exchange field, while it decreases and closes in TCITF.•EHC (PSPS) increases (decreases) with the exchange field in both TCI and TCITF.