A comparative study of magnetic relaxation in YBa2Cu3−x
Fe
x
O7−y
single crystals |
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Authors: | M D Lan J Z Liu R N Shelton |
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Institution: | (1) Department of Physics, University of California, 95616-8677 Davis, CA, USA |
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Abstract: | The zero-field-cooled magnetization relaxation has been studied over wide temperature and field ranges on iron-doped YBa2Cu3O7–y
single crystals. The relationship between the twin boundary density, which depends on the iron composition, and the pinning strength of the flux lines is determined systematically. For magnetic fields up to 1 T the inductive critical current density decreases as the iron composition increases. The Bean critical state model and the Anderson-Kim thermally activated flux-creep model are utilized to analyze and interpret the experimental results. |
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Keywords: | 74 60 Ge 74 60 Mj 74 60 Jg |
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