The magnetocaloric (MC) properties of Ni_0.5Cu_0.25Zn_0.25Fe₂O₄ (NCZFO) nanoferrite samples prepared under different annealing temperatures were simulated by phenomenological model. The results indicate that MC properties of NCZFO nanoferrites change none monotonically with annealing temperature. Furthermore, the range of temperatures between 407 and 515 K are suitable for NCZFO nanoferrites to be used as an effective material in magnetic refrigeration (MR). It is concluded that NCZFO nanoferrites are very practical MC materials in MR for high temperature applications like automotive, aerospace, and food industries.

中文翻译：

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Ni 0.5 Cu 0.25 Zn 0.25 Fe 2 O 4纳米铁氧体的模拟磁热性质

通过现象学模型模拟了在不同退火温度下制备的Ni _0.5 Cu _0.25 Zn _0.25 Fe ₂ O ₄（NCZFO）纳米铁氧体样品的磁热性能。结果表明，NCZFO纳米铁氧体的MC性能不会随退火温度单调变化。此外，温度范围在407和515 K之间适合NCZFO纳米铁氧体用作磁性制冷（MR）的有效材料。结论是，NCZFO纳米铁氧体是MR的非常实用的MC材料，适用于汽车，航空航天和食品工业等高温应用。