Abstract
μSR vortex data of YBa 2Cu 3O 7− δ (YBCO) are examined to determine the field dependence of antiferromagnetism (AF) in and near the vortex cores. Field distributions are obtained using maximum entropy. The vortex signal is best fitted by a Lorentzian indicating AF in and near the vortex cores. The field dependence of the YBCO AF Lorentzian linewidth qualitatively agrees with theoretical predictions.
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