Abstract
Monocrystalline and polycrystalline samples of Al:R ( R = Y, Gd, Tb, Dy, Er, Ho) were prepared by arc and levitation melting and the Czochralski method from the levitated melt. It follows from the electrical and magnetic measurements as well as the X-ray examinations that the equilibrium solid solubility is less than 100 ppm. The residual resistivity has a maximum at about 150 ppm and then decreases dramatically with increasing concentration. This is explained by nucleation of the RAl 3 phase.
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