Accession Number : AD0720888

Title :   New Nonstoichiometric Compounds with Semiconductor-Metal Transition.

Descriptive Note : Final rept.,

Corporate Author : CORNELL UNIV ITHACA N Y DEPT OF CHEMISTRY

Personal Author(s) : Sienko,M. J.

Report Date : 31 DEC 1970

Pagination or Media Count : 13

Abstract : The report summarizes research undertaken to synthesize and investigate new nonstoichiometric compounds of the transition elements, particularly at the metal-nonmetal transition. Systems studied included the oxide bronzes, oxygen-deficient oxides, and rare-earth hexaborides. Magnetic, electric, Hall and Seebeck, and resonance properties are described. The principal findings were that defects leading to nonstoichiometry are ordered at much lower dilutions than hitherto believed, the nonmetal-metal transition is rarely sharp, the magnetic coupling in the metallic state is quite weak. (Author)

Descriptors :   (*OXIDES, ELECTRICAL PROPERTIES), (*TUNGSTATES, ELECTRICAL PROPERTIES), (*RARE EARTH ELEMENTS, ELECTRICAL PROPERTIES), TRANSITION METALS, CRYSTAL DEFECTS, HALL EFFECT, SCANDIUM COMPOUNDS, SUPERCONDUCTIVITY, MAGNETIC PROPERTIES

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE