Article ID Journal Published Year Pages File Type
1816799 Physica B: Condensed Matter 2006 4 Pages PDF
Abstract
We report μSR experiments on two lightly doped superconducting YBa2Cu3O6+x samples (0.39⩽x⩽0.41), performed with the initial muon spin polarization rotated by 47∘ from the applied field direction. At low temperature, the muon asymmetry of both samples exhibits a dominant component with very large depolarization rates, due to the presence of frozen magnetic clusters. A two-component model, accounting for muon sites close to the clusters and far from them, respectively, is presented. The model provides a prediction for the time evolution of both the longitudinal and transverse projections of the muon polarization, and yields a good simultaneous fit to the data of each sample at all the applied fields. The best-fit parameters demonstrate that the static internal fields from the magnetic clusters are disordered, in agreement with the absence of long-range magnetic Bragg peaks in neutron diffraction.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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