The effect of the partial substitution of M = Ti, V, Cr, Zr, and Nb for Fe in the Pr₂Fe₁₇ and Tm₂Fe₁₇ alloys on their structural, magnetic, and magnetocaloric properties have been studied using magnetic measurements, X-ray, and neutron diffraction. The character of substitution of Ti, V, Cr, Zr, and Nb atoms for Fe atoms, along with the differences in atomic radii of these elements, substantially affects variations of the lattice parameters and Curie temperatures of the Tm₂Fe_17 – xM_x and Pr₂Fe_17 – xM_x alloys. The Curie temperature of all the substituted alloys increases; the rate of the increase in the Curie temperature of the Tm₂Fe_17 – xM_x alloys is twice that of the Pr₂Fe_17 – xM_x alloys. The magnetic moment of iron atoms M_Fe and the magnetocaloric effect –ΔS_M decrease for the substituted Tm₂Fe_17 – xM_x and Pr₂Fe_17 – xM_x alloys and become close in the case of all M.

使用磁性测量方法研究了用M = Ti，V，Cr，Zr和Nb部分取代Pr ₂ Fe ₁₇和Tm ₂ Fe ₁₇合金中的Fe对其结构，磁性和磁热性能的影响，X射线和中子衍射。Ti，V，Cr，Zr和Nb原子取代Fe原子的特性，以及这些元素的原子半径的差异，极大地影响了Tm ₂ Fe _{17  – x} M的晶格参数和居里温度的变化。_x和Pr ₂ Fe _{17 –  x} M _x合金。所有取代合金的居里温度都升高；Tm ₂ Fe _{17 –  x} M _x合金居里温度的升高速率是Pr ₂ Fe _{17  – x} M _x合金的两倍。对于取代的Tm ₂ Fe _{17 – x} M _x和Pr ₂ Fe _{17 – x} M _x合金，铁原子M _Fe的磁矩和磁热效应–Δ S _M减小，而对于所有M合金，铁原子M _Fe的磁热效应减小。