The effect of substitution of Lu for Ho on some physical properties of LuxHo1−xNi2 solid solutions

The influence of Sc substitution on some physical properties of ScxHo1–xNi2 solid solutions

“…At room temperature, the magnetic susceptibility of ScNi 2 reaches The ferromagnetic Curie temperatures C T were estimated using the maximum in the ( )/ T c c ∂ ∂ plots. It is seen that the substitution of Sc for Ho in the Sc x Ho 1-x Ni 2 solid solutions leads to a decrease in the magnetic ordering temperature; the similar dependence was observed in the case of substitution of Y and Lu for Ho in the earlier investigated systems [6,10]. However, the weakening of interactions between holmium atoms is close to that for the Y x Ho 1-x Ni 2 system, in which the magnetic order manifests itself even in solid solutions containing up to 60% of nonmagnetic atoms, and is stronger than that in the case of the Lu x Ho 1-x Ni 2 system [10].…”

“…The same situation was observed for solid solutions with lutetium and yttrium substituting for holmium in the HoNi 2 compound [6,10]. The substitution of nonmagnetic scandium for holmium markedly modifies the magnetic behaviour of the Sc x Ho 1-x Ni 2 solid solutions.…”

“…The comparison of the pattern expected for the C15 basic struc- ture with all experimental patterns shows the presence of weak extra peaks, which were found in all measured patterns and indexed in the C15 superstructure with the double (2a) lattice parameter. Similar to the previously described Y x Ho 1-x Ni 2 and Lu x Ho 1-x Ni 2 systems [6,10], a correct description of the atomic position parameters of the Sc x Ho 1-x Ni 2 was performed within the space group 43 .…”

“…The solid solutions with x ≤ 0.6 are characterized by a ferromagnetic order and relatively low Curie temperatures, below 20 K. It should be noted, that, in the case of Y x Ho 1-x Ni 2 [6], we have observed the similar situation, i.e., the disappearance of the ferromagnetic order after the substitution of Y for more then 60% of holmium. Only in the Lu x Ho 1-x Ni 2 system [10], the magnetic order manifests itself even in solid solutions with nonmagnetic Lu substituting up to 80% magnetic holmium. The magnetization curves measured at 4.2 K for these samples with various scandium contents are represented in Fig.…”

“…The purpose of this work is to study and analyse the physical properties of Sc x Ho 1-x Ni 2 solid solutions upon dilution of the magnetically ordered HoNi 2 compound with the nonmagnetic ScNi 2 compound and to compare the obtained results with our earlier experimental data obtained for two systems Y x Ho 1-x Ni 2 [6] and Lu x Ho 1-x Ni 2 [10].…”