We investigated the magnetocaloric effect in commercial Er₂O₃ powders which presents almost no hysteresis losses at low temperature. At a magnetic field change of 5 T, it displays large magnetic entropy change (−ΔS_M)_max of 15.02 J/(kg^.K) and a refrigerant capacity (RC) of 311 J/K at Néel temperature T_N = 3.32 K. The magnetic transition was found to be of a second-order. The maximum values of adiabatic temperature change (ΔT_ad)_max reach 0.70 K for a magnetic field change of 1 T. The large value, of (−ΔS_M)_max as well as no hysteresis loss, makes Er₂O₃ a promising material as a magnetic refrigerant at low temperature.

我们研究了商业 Er ₂ O ₃粉末在低温下几乎没有磁滞损失的磁热效应。在 5 T 的磁场变化下，它显示出 15.02 J/(kg ^. K) 的大磁熵变化 ( − Δ S _M ) _max和在 Néel 温度T _N  = 3.32 时的制冷剂容量 (RC) 为 311 J/K K. 发现磁跃迁是二阶的。对于1 T 的磁场变化，绝热温度变化 (Δ T _ad ) _{max 的最大值}达到 0.70 K。 (-Δ S _M ) _max的大值以及没有磁滞损耗，使 Er ₂ O ₃成为一种很有前途的低温磁性制冷剂材料。