Accession Number : AD0286456

Title :   Superconductivity in Metals and Alloys.

Corporate Author : RCA LABS PRINCETON N J

Personal Author(s) : CHERRY,W.H. ; CODY,G.D.

Report Date : AUG 1962

Pagination or Media Count : 1

Abstract : Methods were developed for the measurement of the interphase energy in superconductors. A description of the method is given along with preliminary results on thin foils and films of tin. Measurements were made of the thermal contact resistance (Kapitza resistance) between various solids and liquid He in the normal and superconducting states for Pb, Sn and in, and for the insulator sapphire. Qualitative agreement is found between the results and current theories of the Kapitza resistance. Measurements of the effect of H and D on the superconducting transition temperature of La revealed that they both depress the transition temperature, H more than D. Measurements were made of the transition temperatures in the system (Nb, Ta, V)3Sn. The transition temperatures range from 2.8 to 18 K and can be related to a simple mass and volume dependence. Critical field measurements indicate behavior similar to that in other ''hard'' superconductors. Resistance measurements revealed a resistance anomaly near 100 K which can be related to existing theories. A new method of preparation of Nb3Sn was developed. (Author)

Descriptors :   *ALLOYS, *METALS, *SUPERCONDUCTIVITY, *SUPERCONDUCTORS, DEUTERIUM, FOILS(MATERIALS), HELIUM, HYDROGEN, INDIUM, INTERMETALLIC COMPOUNDS, LANTHANUM, LEAD(METAL), LIQUEFIED GASES, LOW TEMPERATURE RESEARCH, METAL FILMS, METALLIC SOAPS, NIOBIUM ALLOYS, PHASE STUDIES, RESISTANCE (ELECTRICAL), SAMARIUM, SYNTHESIS, TANTALUM ALLOYS, TIN, TIN ALLOYS, TRANSITION TEMPERATURE, VANADIUM ALLOYS

Distribution Statement : APPROVED FOR PUBLIC RELEASE