Vortex structure in MgB2 single crystals observed by the Bitter decoration technique

L. Ya. Vinnikov, J. Karpinski, S. M. Kazakov, J. Jun, J. Anderegg, S. L. Bud’ko, and P. C. Canfield
Phys. Rev. B 67, 092512 – Published 31 March 2003
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Abstract

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 absolute value of the London penetration depth, λ=1900±600Å for T6K. Experiments in higher fields (e.g., 200 Oe) clearly show a triangular vortex lattice in both real space (13×13μm2 Bitter decoration image of over 1000 vortices) and reciprocal space.

  • Received 13 September 2002

DOI:https://doi.org/10.1103/PhysRevB.67.092512

©2003 American Physical Society

Authors & Affiliations

L. Ya. Vinnikov

  • Institute of Solid State Physics RAS, Chernogolovka, Moscow Region, 142432, Russia

J. Karpinski, S. M. Kazakov, and J. Jun

  • ETH-Zürich (Hönggerberg), HPF F-22, CH-8093 Zürich, Switzerland

J. Anderegg, S. L. Bud’ko, and P. C. Canfield

  • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011

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Issue

Vol. 67, Iss. 9 — 1 March 2003

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