We summarize the main physical ideas behind the development of the novel solid-state cooling system. The main strategy relies on strengthening of the electrocaloric effect. We show that for practical realization additional piezoelectric layers or new multiferroic materials can be used. 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.
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