Accession Number : AD0622796

Title :   GROWTH AND CHARACTERIZATION OF SINGLE CRYSTALS OF RARE EARTH COMPOUNDS.

Descriptive Note : Quarterly technical rept. no. 9.

Corporate Author : WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA

Report Date : 1965

Pagination or Media Count : 8

Abstract : The electrical resistivities of the intra-rare-earth alloys of dysprosium have been determined at 4.2, 77, and 296K for a continued study of the impurity scattering of the conduction electrons. The resistivity data reveal that substitution of La, Ce, Pr, Nd, and Sm in Dy leads to considerable increases of the residual resistivity of Dy at low temperatures, but the increases disappear at 296K. The impurity-induced resistivities are predominantly due to the exchange scattering of the electrons via the Ruderman-Kittel type exchange interaction between the 4f and conduction electrons. The exchange scattering is shown to depend only on the difference between the atomic spins of the solvent and solute ions, with the spin-orbit coupling playing an insignificant role. Neutron diffraction studies of the CrTe-CrSb solid solutions have revealed the formation of a canted spin structure in the pseudo-binary system with cosine of the cant angle varying as a linear function of the composition. Work was continued on the electrical properties of EuS single crystals, Si-doped CrBr3, and dilute alloys of Pd and Al containing Gd. A magnetic study was initiated of Mn3ZnC.

Descriptors :   (*RARE EARTH COMPOUNDS, SINGLE CRYSTALS), (*SINGLE CRYSTALS, RARE EARTH COMPOUNDS), (*CRYSTAL GROWTH, RARE EARTH COMPOUNDS), DYSPROSIUM COMPOUNDS, ELECTRICAL RESISTANCE, LANTHANUM, SELENIUM, NEODYMIUM, SAMARIUM, IMPURITIES, CRYOGENICS, CERIUM, PRASEODYMIUM, SOLID SOLUTIONS, CHROMIUM ALLOYS, TELLURIUM ALLOYS, ANTIMONY ALLOYS, EUROPIUM COMPOUNDS, SULFIDES, SILICON, CHROMIUM COMPOUNDS, BROMIDES, PALLADIUM ALLOYS, ALUMINUM ALLOYS, GADOLINIUM ALLOYS, NUCLEAR SPINS, MAGNETIC PROPERTIES, MANGANESE COMPOUNDS, ZINC COMPOUNDS, CARBON COMPOUNDS, ELECTRICAL PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE