  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$_9$.

Materials Science