Magnetic field and field orientation dependence of the critical current density in Bi-2212 round wires and other HTS conductors

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The authors have performed measurements of the magnetic field dependence of the critical current density J{sub c} of Bi-2212/Ag round wire produced by isothermal melt processing. In contrast to the case for flat tape, there is very little dependence of J{sub c} on the direction of the magnetic field as it is rotated normal to the wire axis, which is the direction of the nominal current flow. However, when the angle of the magnetic field direction is rotated from normal to the wire axis to parallel to that axis, J{sub c} at 64 K and 0.2 T increases by more ... continued below

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6 p.

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Willis, J.O.; Holesinger, T.G.; Coulter, J.Y. & Maley, M.P. October 1, 1996.

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Description

The authors have performed measurements of the magnetic field dependence of the critical current density J{sub c} of Bi-2212/Ag round wire produced by isothermal melt processing. In contrast to the case for flat tape, there is very little dependence of J{sub c} on the direction of the magnetic field as it is rotated normal to the wire axis, which is the direction of the nominal current flow. However, when the angle of the magnetic field direction is rotated from normal to the wire axis to parallel to that axis, J{sub c} at 64 K and 0.2 T increases by more than a factor of four. Again, this is in contrast to the results observed for Bi-2212/Ag and Bi-2223/Ag flat tapes, which show no anisotropy under similar experimental conditions. They can explain these differences in angular anisotropy by referring to the microstructure of these two conductor types, which have distinctly different types of grain alignment. They discuss the general behavior of the dependence of J{sub c} on the orientation of a magnetic field for high temperature superconductors.

Physical Description

6 p.

Notes

INIS; OSTI as DE96014928

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  • Applied superconductivity conference, Pittsburgh, PA (United States), 25-30 Aug 1996

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  • Other: DE96014928
  • Report No.: LA-UR--96-3185
  • Report No.: CONF-960850--5
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/378899 | External Link
  • Office of Scientific & Technical Information Report Number: 378899
  • Archival Resource Key: ark:/67531/metadc689034

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  • October 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Feb. 25, 2016, 8:43 p.m.

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Willis, J.O.; Holesinger, T.G.; Coulter, J.Y. & Maley, M.P. Magnetic field and field orientation dependence of the critical current density in Bi-2212 round wires and other HTS conductors, report, October 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc689034/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.