Accession Number : AD0802961

Title :   INVESTIGATION OF THE STOICHIOMETRIC AND STRUCTURAL VARIABLES WHICH AFFECT CONDUCTIVITY IN FERROMAGNETIC CERAMIC MATERIALS FOR USE IN MAGNETIC CIRCUITS.

Descriptive Note : Technical rept. May 60-May 61,

Corporate Author : GENERAL ELECTRIC RESEARCH LAB SCHENECTADY NY

Personal Author(s) : Horn, F. H. ; Slack, G. A. ; Engeler, W. E.

Report Date : MAY 1961

Pagination or Media Count : 85

Abstract : Results of investigations of the electrical resistivity, thermoelectric power, thermal conductivity, optical reflectivity, and absorption as functions of temperature are reported for magnetite and cobalt iron ferrites prepared as high-purity single crystals with controlled stoichiometry. New data are compared with those in the literature. The influence of the magnetic transition on thermal conductivity in the ferrites is deduced by a comparison with data for nonmagnetic spinels. An idealized model for the electrical properties is partially developed from the electrical and optical results. (Author)

Descriptors :   (*FERROELECTRIC CRYSTALS, THERMAL CONDUCTIVITY), (*CERAMIC MATERIALS, THERMAL CONDUCTIVITY), MAGNETIC PROPERTIES, TEMPERATURE, CIRCUITS, MAGNETITE, FERRITES, COBALT ALLOYS, IRON ALLOYS, ELECTRICAL PROPERTIES, OXIDES, MAGNESIUM COMPOUNDS, ALUMINUM COMPOUNDS.

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE