The intermetallics of U(Mn_1−xCu_x)₂Ge₂ (0.0 ≤ x ≤ 0.2) were synthesised and their magnetic properties and crystal structure were investigated by means of dc magnetization and Neutron Diffraction (ND) measurements. With Cu doping up to x = 0.2, the crystal structure remains the same in tetragonal structure with space group (I4∕mmm m m). Rietveld refinement of the room temperature ND data suggests that the d_U−U is greater than Hill’s critical distance ~3.5 Å for all the compounds and altered values of d_U−T distance results into modification of the magnetic properties of UMn₂Ge₂ intermetallic compound. Detailed study reveals inducement of antiferromagnetism at low temperatures, reduction in T_C and a Griffith’s phase above ferromagnetic T_C in the doped compounds. With increasing Cu, Griffith’s phase becomes more prominent. Replacing Mn with Cu randomly in the lattice gives rise to disorder which results in short range spin - spin correlations leading Griffith’s like phase. Further, decrease of volume and lattice parameter c results in antiferromagnetic interactions leading to AFM order at low temperatures. AFM order progressively gets stronger for higher Cu doping.

U的金属间化合物（锰_{1- X}的Cu _X）₂的Ge ₂（0.0≤  X  ≤0.2）的合成和它们的磁特性和晶体结构是由直流磁化和中子衍射（ND）测量来研究。与铜掺杂到X  = 0.2时，晶体结构仍保持与空间群（四方结构相同的余4 / MMM毫米）。室温ND数据的Rietveld精修表明d _{ü - ü}比Hill的临界距离〜3.5的所有化合物和d的改变的值更大_{ù - Ť}距离导致UMn ₂ Ge ₂金属间化合物的磁性改变。详细的研究表明，在掺杂的化合物中，在低温下会诱发反铁磁性，降低T _C并在铁磁T _C上方形成格里菲斯相。随着铜的增加，格里菲斯的相变得更加突出。在晶格中用Cu随机替换Mn会引起无序，这导致短距离自旋-自旋相关性导致格里菲斯的类似相。此外，体积和晶格参数c的降低导致在低温下反铁磁相互作用导致AFM有序。对于更高的铜掺杂，原子力显微镜的阶跃逐渐增强。