Observation of vortex structure in MgB$_2$ single crystals by Bitter decoration technique

L. Ya. Vinnikov; J. Karpinski; S. M. Kazakov; J. Jun; J. Anderegg; S. L. Bud'ko; P. C. Canfield

Observation of vortex structure in MgB$_2$ single crystals by Bitter decoration technique

Superconductivity 2007-05-23 v1

Authors: L. Ya. Vinnikov , J. Karpinski , S. M. Kazakov , J. Jun , J. Anderegg , S. L. Bud'ko , P. C. Canfield

Abstract

We report the observation of superconducting vortices in pure and lightly Al doped MgB $_2$ single crystals. Low field experiments allow for the estimation of the London penetration depth, lambda ~ 1900 $\AA$ for T $\sim$ 6 K. Experiments in higher fields (e.g. 200 Oe) clearly show a triangular vortex lattice in both real space (13 $\mu$ m by 13 $\mu$ m Bitter decoration image of over 1000 vortices) and reciprocal space.

Keywords

MgB2 single crystals superconducting vortices Bitter decoration technique London penetration depth vortex lattice

Cite

@article{arxiv.cond-mat/0209448,
  title  = {Observation of vortex structure in MgB$_2$ single crystals by Bitter decoration technique},
  author = {L. Ya. Vinnikov and J. Karpinski and S. M. Kazakov and J. Jun and J. Anderegg and S. L. Bud'ko and P. C. Canfield},
  journal= {arXiv preprint arXiv:cond-mat/0209448},
  year   = {2007}
}

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