Investigation of Pinning Force Density F<sub>p</sub> and Critical Current Density J<sub>c</sub> of Nd<sub>0.33</sub>Eu<sub>0.33</sub>Gd<sub>0.33</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub>(NEG-123) Superconductors with Addition of 211 Phase Particles and Analysis with a Theoretical Evaluation Based on Flux Creep-Flow Model
Keywords:The pinning force density Fp and the critical current density Jc , NEG-123 superconductors, 211 secondary phase particles, Flux-creep-flow model
The pinning force density Fp and the critical current density Jc were investigated in Nd0.33Eu0.33Gd0.33Ba2Cu3O(NEG-123) superconductors with addition of NEG-211 and EG-211 secondary phase particles of the volume fractions up to 10 mol% by analyzing experimental data of DC magnetization and compared with theoretical calculation based on flux creep-flow model taking the pinning parameter into account. The pinning parameters such that the number of flux lines in the flux bundle (g2), the most probable value of pinning strength (Am), distribution width (σ2), upper critical field (Bc2) were determined so that a good fit was obtained between theoretical and experimental results.
The Chittagong Univ. J. Sci. 42(1): 24-38, 2020
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Copyright (c) 2020 M N Hasan, M Muralidhar
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