Intergranular fields and Josephson critical currents in HTS ceramics
R Navarro; L J Campbell; R Navarro; Theor. Div., Los Alamos Nat. Lab., NM, USA; L J Campbell; Theor. Div., Los Alamos Nat. Lab., NM, USA
Журнал:
Superconductor Science and Technology
Дата:
1992-01-01
Аннотация:
The critical current J<sub>c</sub> of a granular HTS is modeled by Josephson type junctions to describe the weak-link network and by effective medium theories to estimate the magnetic field at the junctions. Previous theoretical work for H<H<sub>c1</sub> has been reproduced and extended for H>H<sub>c1</sub>. Intergranular fields inconsistent with earlier suppositions on J<sub>c</sub>(H) hysteresis are found.
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