Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1816799 | Physica B: Condensed Matter | 2006 | 4 Pages |
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 47â 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
Authors
G. Allodi, S. Sanna, G. Concas, R. Caciuffo, R. De Renzi,