Preparation and Properties of Rare-Earth Compounds
Abstract
The preparation and characterization and certain physical properties of some rare-earth compounds of technological potential are described. Magneto- ferroelectric materials and narrow-band narrow-gap semiconductors were investigated. In the former area, development of a simultaneously ferroelectric and ferromagnetic device element operating in a useful temperature range is the primary goal. The principal materials studied were bismuth-neodymium ferrites. It was found that addition of neodymium led to weak ferromagnetism at room temperature in the ferroelectric BiFeO3 phase. A nuclear-magnetic-resonance study of certain samarium monochalcogenides, which undergo semiconductor-to- metal transitions at elevated pressure, was carried out in order to determine the degree of localization of the samarium 4f states in these materials. Experiments on cathodoluminescence in these materials and further investigations of allegedly ferroelectric ytterbium chromite are also reported briefly.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1972
- Accession Number
- AD0744980
Entities
People
- Alfred E. Austin
- James F. Miller
- Kenneth C. Brog
- Van E. Wood
- William H. Jones Jr.
Organizations
- Battelle Memorial Institute