Distribution of activation energies for thermally activated flux motion in high-Tcsuperconductors: An inversion scheme
作者： C. W. Hagen , R. Griessen
DOI: 10.1103/PHYSREVLETT.62.2857
关键词: Inorganic compound 、 Superconductivity 、 Distribution function 、 Single crystal 、 Magnetic flux 、 Physics 、 Condensed matter physics 、 High-temperature superconductivity 、 Activation energy 、 Magnetic moment
摘要: Within a thermally activated flux-motion model we derive an exact inversion scheme which makes it possible to calculate the distribution m(${\mathrm{E}}^{\mathrm{*}}$) of activation energies ${\mathrm{E}}^{\mathrm{*}}$ for flux motion from experimental magnetic relaxation data M(t,T). The distributions determined polycrystalline and single-crystalline ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ strongly resemble log-normal function. results show that within this existing imply structural disorder is present in both ceramic samples.
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