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Local probe of vortex pinning energies in the Bose glass

Beauchamp, K. M. and Radzihovsky, L. and Shung, E. and Rosenbaum, T. F. and Welp, U. and Crabtree, G. W. (1995) Local probe of vortex pinning energies in the Bose glass. Physical Review B, 52 (17). pp. 13025-13028. ISSN 1098-0121. doi:10.1103/PhysRevB.52.13025.

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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 B<B_ φ. In regions of the crystal where B>B _ 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.

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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.
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Department of Energy (DOE)W-31-109-ENG-38
Issue or Number:17
Record Number:CaltechAUTHORS:20140707-163035325
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46996
Deposited By: George Porter
Deposited On:09 Jul 2014 20:02
Last Modified:10 Nov 2021 17:32

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