Magnetic relaxation and the lower critical fields in a y-ba-cu-o crystal
- 1 December 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 38 (16), 11828-11831
- https://doi.org/10.1103/physrevb.38.11828
Abstract
We report a low-temperature study of magnetic relaxation for fields applied along the principal axes of a Y-Ba-Cu-O crystal. The lower critical fields are identified by the onset of relaxation at 900 ± 100 Oe and 250 ± 50 Oe for and , respectively. The field dependence of the relaxation rates above the critical fields is interpreted with a thermally activated flux creep model.
Keywords
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