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

Abstract

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 ($-\Delta S_{\mathrm{M}}^{\max }$) 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${}_9$.

7 pages, 5 figures