On tuning the magnetocaloric effect in Ni-Mn-In Heusler alloy ribbons with thermal treatment

► Improvement of the magnetocaloric response in Heusler alloys ribbons with annealing. ► Analysis of the first- and second-order phase transition temperatures. ► Enhancement of both the magnetic entropy change and the refrigerant capacity. ► The Maxwell relation and the Clausius-Clapeyron equation provide similar results.