Abstract The series of polycrystalline Ho(Fe1-xCox)3 intermetallic compounds adopting rhombohedral PuNi3-type of crystal structure have been analyzed. The partial replacement of Fe by Co atoms is reflected in the variation within the total value of saturation magnetic moment MS from 5.21 μB/f.u (x = 0.0) to 5.60 μB/f.u (x = 1.0) and simultaneous decrease of the Curie temperature TC from about 573 K (x = 0.0) to 371 K (x = 1.0). The composition dependence of the Curie temperature TC(x) and compensation temperature Tcomp(x) is related with the change in the number of 3d electrons. The valence band spectra as well as the core level lines have been analyzed at room temperature by the use of X-ray photoemission spectroscopy (XPS). The slight modification within valence bands near the Fermi level dominated by hybridized (Fe/Co)3d states has been discussed. The analysis of 3s spectra has been performed based on multiplet splitting. The evolution of Mossbauer spectra at 300 K and 80 K and estimated hyperfine parameters versus Fe/Co doping can be associated with the itinerant electron model.

中文翻译：

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3d掺杂对Ho(Fe1-xCox)3金属间化合物电子结构与磁性相关性的影响

摘要 分析了一系列采用菱形PuNi3型晶体结构的多晶Ho(Fe1-xCox)3金属间化合物。Co原子对Fe的部分替代反映在饱和磁矩MS的总值从5.21 μB/fu (x = 0.0)到5.60 μB/fu (x = 1.0)的变化以及居里温度TC的同时降低从大约 573 K (x = 0.0) 到 371 K (x = 1.0)。居里温度 TC(x) 和补偿温度 Tcomp(x) 的成分依赖性与 3d 电子数量的变化有关。价带光谱以及核心能级线已在室温下通过使用 X 射线光电子能谱 (XPS) 进行分析。已经讨论了由杂化 (Fe/Co)3d 态主导的费米能级附近价带内的轻微修改。3s 光谱的分析是基于多重分裂进行的。穆斯堡尔谱在 300 K 和 80 K 下的演变以及估计的超精细参数与 Fe/Co 掺杂的关系可以与流动电子模型相关联。