SQUID imaging of edge magnetization and weak local diamagnetism in un-doped Ba122

ORAL

Abstract

Motivated by reports of filamentary superconductivity in the Iron-based Ba pnictide superconductors (Ba122), we used a scanning SQUID (Superconducting Quantum Interference Device), with sub-micron resolution, to detect local magnetization and susceptibility variation of Ba122 single crystals. We found evidence of both weak local diamagnetism and static magnetization. Intriguingly, the magnetization seems to appear on certain facets of the crystal.

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Presenters

  • Ruby Shi

    Stanford Univ

Authors

  • Ruby Shi

    Stanford Univ

  • Johanna Palmstrom

    Stanford Univ

  • John Kirtley

    GLAM, Stanford University, Stanford Univ

  • Hilary Noad

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Applied Physics, Stanford Univ, Stanford Univ

  • Kathryn Moler

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Physics and Applied Physics, Stanford University, Applied Physics, Stanford Univ, Stanford Univ

  • Ian Fisher

    Stanford University, Applied Physics, Stanford University, Stanford Univ