The effect of disorder on the critical points in the vortex phase diagram of YBCO

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The effect of line disorder induced by heavy ion irradiation and of point disorder induced by proton and electron irradiation on the upper and lower critical points in the vortex phase diagram of YBCO is presented. The authors find that dilute line disorder induces a Bose glass transition at low fields which is replaced at the lower critical point by first order melting at higher fields. Strong pinning point defects raise the lower critical point, while weak pinning point defects have little or no effect on the lower critical point. The upper critical point is lowered by point disorder, but ... continued below

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21 p.

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Crabtree, G. W.; Kwok, W. K.; Paulius, L. M.; Petrean, A. M.; Olsson, R. J.; Karapetrov, G. et al. January 19, 2000.

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The effect of line disorder induced by heavy ion irradiation and of point disorder induced by proton and electron irradiation on the upper and lower critical points in the vortex phase diagram of YBCO is presented. The authors find that dilute line disorder induces a Bose glass transition at low fields which is replaced at the lower critical point by first order melting at higher fields. Strong pinning point defects raise the lower critical point, while weak pinning point defects have little or no effect on the lower critical point. The upper critical point is lowered by point disorder, but raised by line disorder. First order melting is suppressed by point disorder in two ways, by lowering of the upper critical point only for weak point pins, or by merging of the upper and lower critical points for strong point pins. The differing responses of the upper and lower critical points to line and point disorder can be understood in a picture of transverse and longitudinal spatial fluctuations.

Physical Description

21 p.

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INIS; OSTI as DE00751885

Medium: P; Size: 21 pages

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  • 1st Euroconference on Vortex Matter Superconductors, Crete (GR), 09/18/1999--09/24/1999

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  • Report No.: ANL/MSD/CP-100892
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 751885
  • Archival Resource Key: ark:/67531/metadc707506

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  • January 19, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 7, 2017, 7:20 p.m.

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Crabtree, G. W.; Kwok, W. K.; Paulius, L. M.; Petrean, A. M.; Olsson, R. J.; Karapetrov, G. et al. The effect of disorder on the critical points in the vortex phase diagram of YBCO, article, January 19, 2000; Illinois. (digital.library.unt.edu/ark:/67531/metadc707506/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.