In this work, a novel polycrystalline Mn₅Ge_2.9Fe_0.1 compound has been prepared and a detailed analysis on structural, physical and magnetocaloric properties is carried out. Mn₅Ge_2.9Fe_0.1 compound is a second order-itinerant ferromagnet with enhanced Sommerfeld coefficient. The resistivity of this compound is found to show saturation at high temperatures due to spin fluctuations in the compound. Critical behavior analysis has been performed in near-Curie temperature regime and the exponents are estimated. The validity of these exponents is double checked by adopting several scaling hypothesis. The above study however revealed that the magnetic interactions in Mn₅Ge_2.9Fe_0.1 compound is of short-range and comply well with 3D-Ising model. Nevertheless, a modest MCE around room temperature in concert with a substantial temperature width renders Mn₅Ge_2.9Fe_0.1 compound as an appreciable magnetic refrigerant.

在这项工作中，制备了一种新型的多晶Mn ₅ Ge _2.9 Fe _0.1化合物，并对结构，物理和磁热性能进行了详细分析。Mn ₅ Ge _2.9 Fe _0.1化合物是具有增强的Sommerfeld系数的二次流动铁磁体。由于该化合物的自旋波动，发现该化合物的电阻率在高温下表现出饱和。已在接近居里温度条件下进行了关键行为分析，并估计了指数。这些指数的有效性通过采用几种定标假设进行了双重检验。然而，以上研究表明，Mn ₅中的磁性相互作用Ge _2.9 Fe _0.1化合物的射程短，并且符合3D-Ising模型。然而，在室温附近适度的MCE与相当大的温度宽度相一致，使Mn ₅ Ge _2.9 Fe _0.1化合物成为一种显着的磁性制冷剂。