Accession Number:

AD0735120

Title:

Preparation and Properties of Rare-Earth Compounds

Descriptive Note:

Semiannual technical rept. 4 Jun 1971-3 Jan 1972

Corporate Author:

BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS LABS

Personal Author(s):

• Wood, Van E.
• Brog, Kenneth C.
• Austin, Alfred E.
• Miller, James F.
• Jones, Jr, William H.

Report Date:

1972-01-04

Pagination or Media Count:

47.0

Abstract:

Preparation, characterization, and physical properties of rare-earth compounds of technological potential are described. Work was in the areas of magneto ferroelectric materials and of narrow-band narrow-gap semiconductors. In the former area, the primary objective was to develop a simultaneously ferroelectric and ferromagnetic device element operating in a useful temperature range. Solid solutions of rare-earth manganites, chromites, and ferrites have been the main object of investigation. Narrow-band narrow-gap semiconductors undergoing purely electronic semiconductor-to-metal transitions are of considerable practical and fundamental interest. The transitions investigated were the pressure-induced ones in the Sm chalcogenides. Work is continuing on solid solutions of similar composition. Some of these materials display strong white cathodoluminescence.

Descriptors:

• *SEMICONDUCTORS
• *FERROMAGNETIC MATERIALS
• *FERROELECTRIC MATERIALS
• *RARE EARTH COMPOUNDS
• LUMINESCENCE
• SOLID SOLUTIONS
• CRYSTAL GROWTH
• SULFIDES
• FERRITES
• SELENIDES
• HOLMIUM COMPOUNDS
• SAMARIUM COMPOUNDS
• YTTERBIUM COMPOUNDS
• DEPOSITION
• CHROMATES
• MANGANATES
• CRYSTAL STRUCTURE
• SYNTHESIS(CHEMISTRY)

Subject Categories:

• Inorganic Chemistry
• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE