Erbium electrical resistivity

Fig. 90. The normalized electrical resistivity for erbium-rich metallic glasses (Hadjipanayis et al., 1980).

Investigations of phase equilibria in the erbium-yttrium system have been conducted by Markova et al. (1964) and by Spedding et al. (1973). The first group used distilled yttrium metal of 99.6(wt )% purity and erbium metal of about 98(wt )% purity. The principal impurities included Ca, Fe, Cu, Ta and other rare earth metals. The alloys were arc-melted under purified helium and studied in the annealed state. Microscopy, differential thermal analyses and X-ray methods were utilized and measurements of hardness and electrical resistivity were performed on the alloy specimens. The main difficulty experienced in their thermal analysis was the narrow temperature interval between the melting of their alloys and the polymorphic transformations. 

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