GROWTH AND CHARACTERIZATION OF SINGLE CRYSTALS OF RARE EARTH COMPOUNDS.
Abstract
Single crystalline films of EuS, having either (100) or (111) orientation, were prepared by vapor-deposition techniques. Three alkali halides, NaCl, NaBr, and CaF2 were found satisfactory as substrate materials for the epitaxial growth of EuS. A simple mode of epitaxy was observed for both the (100) and (111) cleavage surfaces. The conditions for the deposition and the quality of the films were critically examined. Some striking effects were noted of the doping of La on the electrical conduction of EuS. In addition to a marked decrease in resistivity at all temperatures between 4.2 and 300, La substitution also causes a slight incr ase of the Curie temperature. Ferromagnetic EuS with La as little as 1% exhibit metallic behavior in the electrical conduction below the Curie temperature. In all doped compounds, the resistivities drop by several orders of magnitude accompanying the paramagnetic approaches ferromagnetic transition. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1944
- Accession Number
- AD0438516
Entities
Organizations
- Westinghouse Electric Corporation