Published November 1, 1995
| Published
Journal Article
Open
Local probe of vortex pinning energies in the Bose glass
Chicago
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Abstract
Columnar defects provide strong pinning centers for vortices in high-T_c superconductors, increasing global critical currents. Using a magnetometer array of micron dimensions, we characterize the local held profiles in untwinned single crystals of YBa_2Cu_3O_(7-δ) with equivalent columnar defect densities B_φ. We find that the critical current is large only where the internal magnetic field BB _ φ, the critical current is sharply reduced. We model both local and global critical current measurements by generalizing the Bean picture to the case of irradiated high-T_c superconductors.
Additional Information
© 1995 The American Physical Society. Received 5 July 1995. We thank V. Vinokur for illuminating discussions, and we are indebted to J. Hettinger and B. Glagola for making the crystal irradiation at ATLAS a success. This work was supported by the National Science Foundation (DMR91-20000) through the Science and Technology Center for Superconductivity. G.W.C. acknowledges support from the U.S. Department of Energy, Basic Energy Sciences-Materials Science under Contract No. W-31-109-ENG-38.Attached Files
Published - PhysRevB.52.13025.pdf
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PhysRevB.52.13025.pdf
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Additional details
- Eprint ID
- 46996
- Resolver ID
- CaltechAUTHORS:20140707-163035325
- NSF
- DMR91-20000
- Department of Energy (DOE)
- W-31-109-ENG-38
- Created
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2014-07-09Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field