Materials, physics and systems for multicaloric cooling

Calls to minimize greenhouse gas emissions and demands for higher energy efficiency continue drive research into alternative cooling refrigeration technologies. The caloric effect is the reversible change in temperature entropic states of a solid material subjected one or more fields can be exploited achieve cooling. field has undergone series transformations over past 50 years, bolstered by advent new materials devices, these developments have contributed emergence multicalorics decade. Multicaloric display types ferroic order that give rise multiple field-induced phase transitions enhance various aspects effects. These could open up avenues extracting heat spearhead hitherto unknown technological applications. In this Review, we survey emerging multicaloric explore state-of-the-art systems (devices) are responsive fields. We present our vision future applications examine key factors govern overall system devices. promises environmentally friendly high-efficiency refrigeration. authors discuss their physics involving coexisting parameters, potential devices envision