Magnetic and Flux Pinning in Hg-Based HTS Thin Films

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We have studied the critical current density (J{sub c}) as functions of temperature and magnetic field in epitaxial c-axis oriented Hg-1212 and Hg-1223 thin films. J{sub c} near 2 MA/sq cm at 100K and zero field can be achieved when the weak links between the grains are minimized through epitaxial growth of the film. This results in high irreversibility lines in these films. With the addition of columnar defects, the irreversibility line can be further increased within a certain field range. Moreover, an interesting scaling change with increasing pinning is attributed to an improved pancake vortex coupling along the c-axis ... continued below

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11 p.

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Kang, B. W.; Ren, Z. F.; Yun, S. H.; Siegal, M. P. & Christen, D. K. January 1, 1998.

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Description

We have studied the critical current density (J{sub c}) as functions of temperature and magnetic field in epitaxial c-axis oriented Hg-1212 and Hg-1223 thin films. J{sub c} near 2 MA/sq cm at 100K and zero field can be achieved when the weak links between the grains are minimized through epitaxial growth of the film. This results in high irreversibility lines in these films. With the addition of columnar defects, the irreversibility line can be further increased within a certain field range. Moreover, an interesting scaling change with increasing pinning is attributed to an improved pancake vortex coupling along the c-axis of the film.

Physical Description

11 p.

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OSTI as DE98003151

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  • 8. US/Japan workshop on high temperature superconductivity, Tallahassee, FL (United States), 8-10 Dec 1997

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  • Other: DE98003151
  • Report No.: ORNL/CP--96084
  • Report No.: CONF-971227--
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 624013
  • Archival Resource Key: ark:/67531/metadc697653

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  • January 1, 1998

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  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 25, 2016, 6:42 p.m.

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Kang, B. W.; Ren, Z. F.; Yun, S. H.; Siegal, M. P. & Christen, D. K. Magnetic and Flux Pinning in Hg-Based HTS Thin Films, article, January 1, 1998; Tennessee. (digital.library.unt.edu/ark:/67531/metadc697653/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.