CRYSTAL-GROWTH OF R2T17 AND R2FE14B INTERMETALLICS (R=RARE EARTH,T=CO,FE)

Bulk single crystals of R//2Co//1//7 (R equals Nd, Pr, Gd, Tb), R//2Fe//1//7 (R equals Y, Dy, Er) and R//2Fe//1//4B (R equals Y, Nd) have been grown from the melt using a modified 'tri-arc' Czochralski method. The crystals were characterized using standard X-ray techniques. The measured densities were compared with the calculated ones obtained from the lattice parameters. High-field magnetization measurements were performed on some of the as-grown crystals.