Physics – Condensed Matter – Superconductivity
Scientific paper
2002-09-06
Physics
Condensed Matter
Superconductivity
44 pages, 13 figures, submitted to Phys. Rev. B Revision includes Postscript wrapped figures + minor typos
Scientific paper
10.1103/PhysRevB.67.014507
We report measurements of the low field structure of the magnetic vortex lattice in an untwinned YBCO single-crystal platelet. Measurements were carried out using a novel atomic beam magnetic resonance (ABMR) technique. For a 10.7 G field applied parallel to the c-axis of the sample, we find a triangular lattice with orientational order extending across the entire sample. We find the triangular lattice to be weakly distorted by the a-b anisotropy of the material and measure a distortion factor, f = 1.16. Model-experiment comparisons determine a penetration depth, lambda_ab = 140 (+-20) nm. The paper includes the first detailed description of the ABMR technique. We discuss both technical details of the experiment and the modeling used to interpret the measurements.
Dapore-Schwartz Samuel
Hauglin Harald
Lafyatis Gregory P.
Woodard Nathan G.
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