GROWTH AND CHARACTERIZATION OF SINGLE CRYSTALS OF RARE EARTH COMPOUNDS.
Abstract
Small single crystals of EuS, EuSe, and EuTe were prepared by the iodine-transport method. Several modifications of this method were made in an effort to produce crystals of sufficiently large sizes for electrical studies. Epitaxy of EuS onto the (100) cleavage surface of NaCl single crystals was established in the vapor-deposition experiments. Partial single-crystal films were obtained with the NaCl substrates heated at 300C. The Th3P4 structure was studied from the viewpoint of either electrostatic energy or atomic bonding. Magnetic data for the sesquisulfides of Ce, Pr, Nd, Gd, Dy, Ho, Er, and Tm indicate that none of the sulfides would become ferromagnetic. A large effect of the substitution of Gd in Ho was observed upon the transition temperature of the paramagnetic to antiferromagnetic ordering. Work has been completed on an interesting electrical and magnetic anomaly in LaCoO3. This anomaly originates from a spin reversal within the d shell of the Co ion. Progress was made in the theory of neutron scattering from impurities and localized vibrational modes. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0428768
Entities
Organizations
- Westinghouse Electric Corporation