The circulation radius and critical current density in type-II superconductors

Denis Gokhfeld

doi:10.1134/S1063785019010243

The circulation radius and critical current density in type-II superconductors

Superconductivity 2019-04-30 v3

Authors: Denis Gokhfeld

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Abstract

A method is proposed for estimating the length scale of currents circulating in superconductors. The estimated circulation radius is used to determine the critical current density on the basis of magnetic measurements. The obtained formulas are applicable to samples with negligibly small demagnetizing factors and to polycrystalline superconductors. The proposed method has been verified using experimental magnetization loops measured for polycrystalline YBa $_2$ Cu $_3$ O $_{7-d}$ and Bi $_{1.8}$ Pb $_{0.3}$ Sr $_{1.9}$ Ca $_2$ Cu $_3$ O $_x$ superconductors.

Keywords

superconductivity high-temperature superconductivity

Cite

@article{arxiv.1901.06797,
  title  = {The circulation radius and critical current density in type-II superconductors},
  author = {Denis Gokhfeld},
  journal= {arXiv preprint arXiv:1901.06797},
  year   = {2019}
}

Comments

5 pages, 1 figure

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