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Solid-State Cooler: New Opportunities

The main physical ideas behind the development of the novel solid-state cooling system have been summarized. The basic strategy relies on strengthening of the electrocaloric effect. We show that for this purpose additional piezoelectric layers or new multiferroic materials can be used as a practical realization. Moreover, a combination of the electrocaloric effect and an external force is very promising. This force can be either the magnetic field or the mechanical stress. The proposed concept is supported by experimental data and theoretical calculations.