Accession Number : ADA181170

Title :   Unusual Electronic Properties of Defect and Substituted Oxides with the Rutile Structure.

Descriptive Note : Final rept. 15 Apr 83-15 Sep 86,

Corporate Author : BROWN UNIV PROVIDENCE RI DEPT OF CHEMISTRY

Personal Author(s) : Wold,A. ; Gray,M. L. ; Croft,W. J. ; Kershaw,R. ; Dwight,K.

Report Date : MAR 1987

Pagination or Media Count : 21

Abstract : The work that is reported in this final technical report covers the period from April 15, 1983 to September 15, 1986 and deals with the preparation and electronic properties of vanadium oxides. This work was carried out in order to determine whether the transition observed in VO2 would be altered as a result of small changes in vanadium oxygen stoichiometry. The work reported by Magneli and his co-workers was confirmed in that there are a number of vanadium oxygen phases with varying amounts of vanadium +3/+4. This gives rise to a series of compounds, each of which has its own distinct electronic transitions. The effect of pressure on these transitions was also studied during our investigation. Keywords: Vanadium oxides; Crystal growth; High pressure transformation; Mott transition; Electrical conductivity; Magnetic susceptibility.

Descriptors :   *VANADIUM, *METAL OXIDE SEMICONDUCTORS, *OXIDES, *CRYSTAL STRUCTURE, CRYSTAL GROWTH, DEFECTS(MATERIALS), ELECTRICAL CONDUCTIVITY, ELECTRON TRANSITIONS, ELECTRONICS, HIGH PRESSURE, MAGNETIC PROPERTIES, OXYGEN, PHASE, RUTILE, STOICHIOMETRY, SUBSTITUTES, TRANSFORMATIONS, COVALENT BONDS, PHASE TRANSFORMATIONS, SEMICONDUCTING FILMS, SUBSTITUTION REACTIONS, MOLECULAR PROPERTIES, MOLECULAR ORBITALS, ENERGY BANDS

Subject Categories : Solid State Physics
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE