Crystal growth and characterization of MT2Si2 ternary intermetallics (M = U, RE and T = 3d, 4d, 5d transition metals)

Autor: H.J. Tan, T.J. Gortenmulder, A.C. Moleman, A.A. Menovsky, G.E. Snel, Thomas Palstra
Přispěvatelé: Zernike Institute for Advanced Materials, Solid State Materials for Electronics
Rok vydání: 1986
Předmět:
Zdroj: Journal of Crystal Growth, 79(1). ELSEVIER SCIENCE BV
ISSN: 0022-0248
DOI: 10.1016/0022-0248(86)90455-0
Popis: Bulk single crystals of the ternary intermetallic compounds UT 2 Si 2 (T = Ni, Pd, Pt and Ru), LaT 2 Si 2 (T = Pd and Rh) and LuPd 2 Si 2 have been grown from the melt with a modified “tri-arc” Czochralski method. The as-grown crystals were characterized by X-ray, microprobe and chemical analyses. The measured densities are compared with the calculated densities as obtained from the lattice parameters. A detailed metallography analysis of both polycrystalline and single-crystalline samples shows that the Mt 2 Si 2 intermetallics exist only in a very narrow homogeneity range and that the segregation of second phase is almost always present in polycrystalline samples and can severely mask the intrinsic properties of these materials. The effect of heat treatment on the electrical resistivity of single-crystalline URu 2 Si 2 is presented, along with some preliminary results on the crystal growth of URh 2 Ge 2 .
Databáze: OpenAIRE