Enhancement of the critical current density of YBa2Cu3Ox superconductors under hydrostatic pressure

T. Tomita; J. S. Schilling; L. Chen; B. W. Veal; H. Claus

doi:10.1103/PhysRevLett.96.077001

Enhancement of the critical current density of YBa2Cu3Ox superconductors under hydrostatic pressure

T. Tomita^*, J. S. Schilling, L. Chen, B. W. Veal, H. Claus

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The dependence of the critical current density Jc on hydrostatic pressure to 0.6 GPa is determined for a single 25°[001]-tilt grain boundary in a bicrystalline ring of nearly optimally doped melt-textured YBa2Cu3Ox. Jc is found to increase rapidly under pressure at +20%/GPa. A new diagnostic method is introduced (pressure-induced Jc relaxation) which reveals a sizable concentration of vacant oxygen sites in the grain boundary region. Completely filling such sites with oxygen anions should lead to significant enhancements in Jc.

Original language	English (US)
Article number	077001
Journal	Physical review letters
Volume	96
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.96.077001
State	Published - 2006

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.96.077001

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AU - Veal, B. W.

AU - Claus, H.

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AB - The dependence of the critical current density Jc on hydrostatic pressure to 0.6 GPa is determined for a single 25°[001]-tilt grain boundary in a bicrystalline ring of nearly optimally doped melt-textured YBa2Cu3Ox. Jc is found to increase rapidly under pressure at +20%/GPa. A new diagnostic method is introduced (pressure-induced Jc relaxation) which reveals a sizable concentration of vacant oxygen sites in the grain boundary region. Completely filling such sites with oxygen anions should lead to significant enhancements in Jc.

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