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Evidence for vortex pinning induced by fluctuations in the transition temperature of (formula presented) superconductors

Journal Article


Abstract


  • The field-dependent critical current density (formula presented) bulk sample has been obtained using magnetic measurements. The (formula presented) curves at different temperatures demonstrate a crossover from single vortex pinning to small-bundle vortex pinning, when the field is larger than the crossover field (formula presented) The temperature dependence of (formula presented) is in agreement with a model of randomly distributed weak pinning centers via the spatial fluctuations of the transition temperature (formula presented) pinning), while pinning due to the mean-free-path fluctuations (formula presented) pinning) is not observed. © 2002 The American Physical Society.

Publication Date


  • 2002

Citation


  • Qin, M. J., Wang, X. L., Liu, H. K., & Dou, S. X. (2002). Evidence for vortex pinning induced by fluctuations in the transition temperature of (formula presented) superconductors. Physical Review B - Condensed Matter and Materials Physics, 65(13), 1-4. doi:10.1103/PhysRevB.65.132508

Scopus Eid


  • 2-s2.0-84880266463

Start Page


  • 1

End Page


  • 4

Volume


  • 65

Issue


  • 13

Abstract


  • The field-dependent critical current density (formula presented) bulk sample has been obtained using magnetic measurements. The (formula presented) curves at different temperatures demonstrate a crossover from single vortex pinning to small-bundle vortex pinning, when the field is larger than the crossover field (formula presented) The temperature dependence of (formula presented) is in agreement with a model of randomly distributed weak pinning centers via the spatial fluctuations of the transition temperature (formula presented) pinning), while pinning due to the mean-free-path fluctuations (formula presented) pinning) is not observed. © 2002 The American Physical Society.

Publication Date


  • 2002

Citation


  • Qin, M. J., Wang, X. L., Liu, H. K., & Dou, S. X. (2002). Evidence for vortex pinning induced by fluctuations in the transition temperature of (formula presented) superconductors. Physical Review B - Condensed Matter and Materials Physics, 65(13), 1-4. doi:10.1103/PhysRevB.65.132508

Scopus Eid


  • 2-s2.0-84880266463

Start Page


  • 1

End Page


  • 4

Volume


  • 65

Issue


  • 13