Abstract
Japan Fine Ceramics Association has carried out a round robin test (RRT) on the bending strain (b) dependence of the critical current Ic at 77 K in three kinds of Bi(2223)/Ag tape samples (VAM-1, JFC-1, JFC-2; three samples each) for future standardization. We measured Ic(b) (b: 0-1.0%) as one of RRT participants and also measured the magnetic field dependence of Ic under several bending strains mentioned above as optional measurements. As results, we found a very fast decrease of Ic in low fields up to 0.5 T and then a gradual decrease up to 1.5-2.0 T. Ic maintains 0.9-0.95 of its initial value up to b=0.4% strain and then decreases a little faster down to 0.60-0.65 at b=1.0% for almost all samples and magnetic fields. The normalized pinning force Fp/Fpmax shows scaling according to the expression Fp/Fpmax∝(B/Birr)(1-(B/Birr)) 3 for all samples and bending strains, where Birr is the irreversibility field.
Original language | English |
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Pages (from-to) | 12-15 |
Number of pages | 4 |
Journal | Physica C: Superconductivity and its applications |
Volume | 382 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2002 Oct 15 |
Externally published | Yes |
Keywords
- Bending strain
- Bi-2223/Ag tape
- Critical current
- Round robin test
- Scaling
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering