Current density and reversible magnetization of HgBa(2)Ca(2)Cu(3)O(x) superconductors containing randomly oriented columnar defects

J. R. Thompson; J. G. Ossandon; L. Krusin-Elbaum; H. J. Kim; D. K. Christen; K. J. Song; K. D. Sorge; J. L. Ullmann

Current density and reversible magnetization of HgBa(2)Ca(2)Cu(3)O(x) superconductors containing randomly oriented columnar defects

Superconductivity 2007-05-23 v1

Authors: J. R. Thompson , J. G. Ossandon , L. Krusin-Elbaum , H. J. Kim , D. K. Christen , K. J. Song , K. D. Sorge , J. L. Ullmann

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Abstract

Bulk polycrystalline HgBa(2)Ca(2)Cu(3)O(x) materials were irradiated with 0.8 GeV protons to form randomly oriented columnar defects, by induced fission of Hg-nuclei. Proton fluences from 0 to 35 times 10^{16} cm^{-2} were used to install defects with area densities up to a "matching field" of 3.4 Tesla. Studies were conducted on the dependence of the equilibrium magnetization and the intragrain persistent current density on temperature and applied magnetic field, at various defect densities. The magnetization was modeled using London theory with the addition of vortex-defect interactions.

Keywords

superconductor columnar defects current density magnetization HgBaCaCuO proton irradiation London theory vortex-defect interaction

Cite

@article{arxiv.cond-mat/0204616,
  title  = {Current density and reversible magnetization of HgBa(2)Ca(2)Cu(3)O(x) superconductors containing randomly oriented columnar defects},
  author = {J. R. Thompson and J. G. Ossandon and L. Krusin-Elbaum and H. J. Kim and D. K. Christen and K. J. Song and K. D. Sorge and J. L. Ullmann},
  journal= {arXiv preprint arXiv:cond-mat/0204616},
  year   = {2007}
}

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REVTEX text plus 7 Postscript figures

Current density and reversible magnetization of HgBa(2)Ca(2)Cu(3)O(x) superconductors containing randomly oriented columnar defects

Abstract

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