Sample size effect on the determination of the irreversibility line of high-Tc superconductors
Creators
- 1. Division of Materials Sciences, Brookhaven National Laboratory, Upton, New York 11973 (United States)
- 2. NKT Research Center, Sognevej 11, DK-2605 Brondby (Denmark)
Description
The irreversibility lines of a high-Jc superconducting Bi2Sr2Ca2Cu3Ox/Ag tape were systematically measured upon a sequence of subdivisions of the sample. The irreversibility field Hr(T) (parallel to the c axis) was found to change approximately as L0.13, where L is the effective dimension of the superconducting tape. Furthermore, it was found that the irreversibility line for a grain-aligned Bi2Sr2Ca2Cu3Ox specimen can be approximately reproduced by the extrapolation of this relation down to a grain size of a few tens of micrometers. The observed size effect could significantly obscure the real physical meaning of the irreversibility lines. In addition, this finding surprisingly indicated that the Bi2Sr2Ca2Cu2Ox/Ag tape and grain-aligned specimen may have similar flux line pinning strength
Additional details
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 64
- Journal Issue
- 2
- Journal Page Range
- p. 250-252.
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 25039331
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; GRAIN SIZE; GRANULAR MATERIALS; HIGH-TC SUPERCONDUCTORS; HYSTERESIS; IRREVERSIBLE PROCESSES; MAGNETIC FLUX; MAGNETIZATION; STRONTIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL STRUCTURE; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MATERIALS; MICROSTRUCTURE; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SIZE; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS