Accession Number : ADA190713

Title :   Magnetic Anomalies in the Rare Earth Oxide Superconductors GdBa2Cu3O(7-x) and YbBa2Cu3O(7-x).

Descriptive Note : Technical rept.,

Corporate Author : NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF CHEMISTRY

Personal Author(s) : Hatfield, William E ; Rohrs, Brian R ; Kirk, Martin L ; Helms, Jeffrey H ; Ro, Hyekyeong

PDF Url : ADA190713

Report Date : 09 Jan 1988

Pagination or Media Count : 12

Abstract : The magnetic properties of GdBa2Cu3O(7-X) and YBa2Cu3O(7-X) have been studied in low applied magnetic field by using pelleted sample. The magnetic behavior may be explained by the occurrence of a spin-glass state due to a granular superconductor. The model assumes superconducting grains which are small compared to the penetration depth, and these are coupled into closed loops. Cooling in zero-field, followed by the application of a field at a fixed temperature produces a metastable state resulting in frustration and spin-glass behavior. Keywords: Superconductivity, Yttrium, Barium, Copper, Ceramic oxide, Perovskite, Gadlinium, Meissner effects, Spin glass.

Descriptors :   *BARIUM, *CERAMIC MATERIALS, *MAGNETIC PROPERTIES, *OXIDES, *SUPERCONDUCTIVITY, *YTTRIUM, COOLING, COPPER, DEPTH, GLASS, LOOPS, MAGNETIC ANOMALIES, MAGNETIC FIELDS, METASTABLE STATE, PENETRATION, SPINNING(MOTION), TEMPERATURE

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE