Magnetic refrigeration (MR) by utilizing the magnetocaloric (MC) effect is recognized as one of the most potential promising solid state environmentally friendly and high efficiency alternative method to the well-used state-of-the-art gas compression cooling technique. In this work, a systematic investigation of quinary equi-atomic rare-earths (RE) based Er₂₀Ho₂₀Gd₂₀Ni₂₀Co₂₀ high-entropy (HE) amorphous alloy in terms of the microstructure, magnetic and magnetocaloric (MC) properties have been reported. The Er₂₀Ho₂₀Gd₂₀Ni₂₀Co₂₀ exhibits promising glass forming ability with an undercooled liquid region of 72 K. Excellent cryogenic MC performances can be found in wide temperature from ∼25 and ∼75 K, close to H₂ and N₂ liquefaction, respectively. Apart from the largest magnetic entropy change (-ΔS_M) reaches 17.84 J/(kg K) with 0-7 T magnetic field change, corresponding refrigerant capacity (RC) attains a giant value of 1030 J/kg. The promising cryogenic MC performances together with the unique HE amorphous characterizations make the quinary Er₂₀Ho₂₀Gd₂₀Ni₂₀Co₂₀ HE amorphous alloy attractive for cryogenic MR applications.

利用磁热 (MC) 效应的磁制冷 (MR) 被认为是最有潜力的固态环境友好型高效替代方法之一，可替代广泛使用的最先进的气体压缩冷却技术。在这项工作中，系统研究了基于五元等原子稀土 (RE) 的 Er ₂₀ Ho ₂₀ Gd ₂₀ Ni ₂₀ Co ₂₀高熵 (HE) 非晶合金的微观结构、磁性和磁热 (MC) 性能已经汇报过。Er ₂₀ Ho ₂₀ Gd ₂₀ Ni ₂₀ Co ₂₀在 72 K 的过冷液体区域表现出良好的玻璃形成能力。在从 ~25 和 ~75 K 的宽温度范围内可以发现出色的低温 MC 性能，分别接近 H ₂和 N ₂液化。除了最大的磁熵变 (-Δ S _M ) 在 0-7 T 磁场变化时达到 17.84 J/(kg K) 外，相应的制冷剂容量 (RC) 达到了 1030 J/kg 的巨值。有前途的低温 MC 性能以及独特的 HE 非晶表征使五元 Er ₂₀ Ho ₂₀ Gd ₂₀ Ni ₂₀ Co ₂₀ HE 非晶合金对低温 MR 应用具有吸引力。