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Low field vortex matter in YBCO: an atomic beam magnetic resonance study

Harald Hauglin·Nathan G. Woodard·Samuel Dapore-Schwartz·Gregory P. Lafyatis
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Abstract

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.

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Harald Hauglin, Nathan G. Woodard, Samuel Dapore-Schwartz, Gregory P. Lafyatis. 2002-09-11. Low field vortex matter in YBCO: an atomic beam magnetic resonance study. https://doi.org/10.1103/physrevb.67.014507

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