Ni–Mn-Ga-Co-Gd microwires were fabricated by the glass-coated melt spinning method, resulting in a bamboo-grained structure. In this paper, the magnetocaloric effect of Ni–Mn-Ga-Co-Gd microwires is mainly investigated, which is represented by the isothermal magnetic entropy change calculated using Maxwell equation. Specifically, NiMnGaCoGd microwires exhibit maximum entropy change of 11.09 J/kg·K under 5 T magnetic field, which is generally greater than that of the current Ni–Mn-Ga microwires. Additionally, NiMnGaCoGd microwires show the temperature corresponding to the greatest magnetic entropy change nearer to room temperature compared to other Ni–Mn-Ga microwires. Furthermore, the larger specific surface area of microwires will facilitate their application in the field of magnetic refrigeration.

中文翻译：

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Ni-Mn-Ga-Co-Gd 微丝中的马氏体相变和逆磁热效应

Ni-Mn-Ga-Co-Gd 微丝采用玻璃涂层熔融纺丝法制备，形成竹粒结构。本文主要研究Ni-Mn-Ga-Co-Gd微丝的磁热效应，该效应用麦克斯韦方程计算的等温磁熵变来表示。具体来说，NiMnGaCoGd微线在5 T磁场下表现出最大熵变11.09 J/kg·K，通常大于当前的Ni-Mn-Ga微线。此外，与其他 Ni-Mn-Ga 微线相比，NiMnGaCoGd 微线显示出最大磁熵变对应的温度更接近室温。此外，微丝较大的比表面积将有利于其在磁制冷领域的应用。