Spatial distribution of internal magnetic field in Hight - $T_c$ superconductors with pancake vortices

ORAL

Abstract

We report here $^{17}$O $T_1$ measurements in single crystals of slightly overdoped ($T_C = 82$ K) Bi2212 at 5 K, in magnetic fields from 15 -- 30 T. In previous work the internal magnetic field distribution in YBCO aligned powders at high magnetic fields has been probed by NMR imaging experiments~[1]. Our results for single crystals of the highly anisotropic superconductor, BSCCO, are remarkably different, and is inconsistent with present theoretical predictions. At 5 K the system is in a 2-D vortex solid phase~[2]. We conclude that the magnetic field distribution for 2-D vortices in the presence of interlayer magnetic and Josephson coupling is radically different from a London vortex lattice.\\[0pt] [1]V.~F.~Mitrovi\ifmmode~\acute{c}\else \'{c}\fi{} \textit {et.al.}, Nature \textbf{413}, 501 (2001). \\[0pt] [2]Bo Chen \textit {et.al.}, Nature Physics \textbf{3}, 239 (2007).

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Authors

  • W.P. Halperin

    • Department of Physics and Astronomy, Northwestern University, IL, USA

  • S. Mukhopadhyay

    • Department of Physics and Astronomy, Northwestern University, IL, USA

  • A.M. Mounce

    • Department of Physics and Astronomy, Northwestern University, IL, USA

  • S. Oh

    • Department of Physics and Astronomy, Northwestern University, IL, USA

  • A.P. Reyes

    • National High Magnetic Field Laboratory, FL, USA

  • P. Kuhns

    • National High Magnetic Field Laboratory, FL, USA

  • H. Takagi

    • Department of Physics, University of Tokyo, Tokyo, Japan

  • S. Uchida

    • Department of Advanced Materials Science, University of Tokyo, Chiba, Japan