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Schematic of the multicaloric testing system. HS = heat switch; ΔT is measured under adiabatic demagnetization and depolarization. The multiferroic material is kept adiabatically under vacuum. The HS can connect/disconnect the material to/from the temperature reservoir, providing the operating T. The temperature change is measured using non-contact IR thermometry or low heat capacity temperature sensors. Image modified from [83].
