The interaction of vortices with twin boundaries

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Twin boundaries provide a convenient defect for investigating vortex dynamics in superconductors. They occur naturally in YBa{sub 2}Cu{sub 3}O{sub 7}, with well defined planar geometries. They are a strong pinning defect, and at the temperature of the melting transition they are the dominant pinning sites in clean crystals. Twin boundaries are easily seen in polarized light, making their location and number directly observable without special equipment. Finally, they present a highly anisotropic pinning potential to the vortices, creating the possibility of interesting new behavior. In this paper, we describe experiments using twin boundaries to probe two effects in vortex dynamics: ... continued below

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10 p.

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Crabtree, G. W.; Kwok, W. K.; Welp, U.; Fendrich, J.; van der Beek, C. J.; Vlasko-Vlasov, V. K. et al. May 1, 1995.

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Description

Twin boundaries provide a convenient defect for investigating vortex dynamics in superconductors. They occur naturally in YBa{sub 2}Cu{sub 3}O{sub 7}, with well defined planar geometries. They are a strong pinning defect, and at the temperature of the melting transition they are the dominant pinning sites in clean crystals. Twin boundaries are easily seen in polarized light, making their location and number directly observable without special equipment. Finally, they present a highly anisotropic pinning potential to the vortices, creating the possibility of interesting new behavior. In this paper, we describe experiments using twin boundaries to probe two effects in vortex dynamics: a new peak effect in the critical current occurring in the solid state just below the melting transition, and anisotropic pinning by planar defects.

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10 p.

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OSTI as DE95012079

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  • NRIM international seminar on superconductors in high magnetic fields, Tsukuba (Japan), 17-18 Feb 1995

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  • Other: DE95012079
  • Report No.: ANL/MSD/CP--85925
  • Report No.: CONF-950292--1
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 67479
  • Archival Resource Key: ark:/67531/metadc709340

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  • May 1, 1995

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  • Sept. 12, 2015, 6:31 a.m.

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  • Aug. 23, 2016, 3:08 p.m.

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Crabtree, G. W.; Kwok, W. K.; Welp, U.; Fendrich, J.; van der Beek, C. J.; Vlasko-Vlasov, V. K. et al. The interaction of vortices with twin boundaries, article, May 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc709340/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.