Evidence for pinning of grain-boundary vortices by Abrikosov vortices in the grains of YBa{sub 2}Cu{sub 3}O{sub 7}
Journal Article
·
· Physical Review B
Data as a function of magnetic field on two types of bicrystal grain boundaries (GB's) of high-T{sub c} superconductors show a peak in the critical current and an unusual inverse hysteresis. These results support a mechanism for an enhanced GB critical current, arising from interactions of GB vortices with pinned Abrikosov vortices in the banks of a GB, as suggested by Gurevich and Cooley. A substantial fraction of this enhancement (of order a factor of 2 after field cooling) also occurs upon exceeding the critical current of the grains after zero field cooling. A bulk GB and an isolated GB from a coated conductor show qualitatively identical results.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205635
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 18 Vol. 62; ISSN 0163-1829
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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