GROWTH AND CHARACTERIZATION OF SINGLE CRYSTALS OF RARE EARTH COMPOUNDS
Abstract
Magnetization measurements were made on the GdNd alloys to ascertain the mode of the spin coupling between a heavy and a light rare earth atom. The magnetic data have substantiated the ferromagnetic spin coupling assumed in the Dekker theory of electrical resistivity of the rare earth alloys. It was further disclosed in a scientific paper that the Dekker theory is inapplicable to approximately half of the possible intra-rare earth alloys. Its failure reflects a lack of understanding of the light rare earth ions. A remedy of the theory necessitates a major change of the analysis basing on the actual energy- level structure of these ions, which is not known at the present time. Low- temperature resistivities were determined of several Pd alloys containing solute atoms of Gd, Rh, and Fe. The electrical data have reconfirmed the absence of the abnormally large spin-polarization effect of the localized moments of the Fe atoms in Pd. Experimental efforts were made to explore the possible occurrence of resistance minimum in the Pd-Gd alloys. The effect of local modes at the impurity centers was examined upon the scattering of electrons in aluminum between 4.2 and 300 K. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1964
- Accession Number
- AD0626865