Observation of vortex structure in MgB₂ single crystals by Bitter decoration technique
Vinnikov, L. Ya. · Karpinski, J. · Kazakov, S. M. · Jun, J. · Anderegg, J. · Bud'ko, S. L. · Canfield, P. C.
Original · EN
We report the observation of superconducting vortices in pure and lightly Al doped MgB₂ single crystals. Low field experiments allow for the estimation of the London penetration depth, lambda 1900 Å for T 6 K. Experiments in higher fields (e.g. 200 Oe) clearly show a triangular vortex lattice in both real space (13 μm by 13 μm Bitter decoration image of over 1000 vortices) and reciprocal space.
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