Magnetocaloric performance of RE$_{11}$Co$_4$In$_9$ (RE = Tb, Er)

The magnetocaloric effect in RE$_{11}$Co$_4$In$_9$ (RE = Tb, Er) has been studied by means of magnetometric measurements in the function of temperature and applied magnetic field. The maximum magnetic entropy change ($-\Delta S_{\mathrm{M}}^{\mathrm{max}}$) at magnetic flux density change ($\Delta\mu_{0}H$) 0-9 T has been determined to be 5.51 J$\cdot$kg$^{-1}\cdot$K$^{-1}$ at 47.4 K for Tb$_{11}$Co$_4$In$_9$ and 14.28 J$\cdot$kg$^{-1}\cdot$K$^{-1}$ at 12.3 K for Er$_{11}$Co$_4$In$_9$, while temperature averaged entropy change (TEC) with 3 K span equals 5.50 and 14.14 J$\cdot$kg$^{-1}\cdot$K$^{-1}$ for RE = Tb and Er, respectively. The relative cooling power (RCP) and refrigerant capacity (RC) equal respectively 522.1 and 391.2 J$\cdot$kg$^{-1}$ in Tb$_{11}$Co$_4$In$_9$ and 605.2 and 463.1 J$\cdot$kg$^{-1}$ in Er$_{11}$Co$_4$In$_9$.