Calculation model on magnetocaloric effect (MCE) and relative cooling power (RCP) in composite materials at room temperature

Highlights: • Refrigerant capacity (RC) was changed by relative cooling power (RCP). • Our work was compared in detail with other recent works in the same field. • All non-relevant references were removed and new references were added and linked correctly to the core text. In this paper, a calculation model is proposed to measure magnetocaloric effect (MCE) and relative cooling power (RCP) in composites based on magnetic materials underscoring a giant MCE at room temperature. The two composite materials targeted are Gd-Gd₅Si₂Ge₂ and MnAs-${\text{Mn}}_{1+\delta }{\text{As}}_{0.9}{\text{Sb}}_{0.1}$ due to their high magnetic entropy change ΔS_M over 270–300 K and 280–320 K. Our selected composites could give a larger RCP value among existing magnetocaloric materials for magnetic refrigeration in the temperature range of 280–300 K which is desirable for ideal Ericsson-cycle magnetic refrigeration. The excellent magnetocaloric properties of these two magnetic composites make them attractive for active magnetic refrigeration at room temperature.