Abstract The dependence of critical current density Jc on the angle $\alpha$ between the directions of the applied magnetic field H (which was rotated in the c-axis-I plane) and the in-plane current I was measured on a c-axis oriented epitaxial YBa2Cu3O7-$\delta$ films at 81 K, with the magnetic field strength up to 6T. Analysis of the experimental results on the basis of the classical scaling law of pinning force shows that there exist simultaneously planar-pinning and volume-pinning mechanisms, and the contribution of volume pinning increases wish decreasing $\alpha$ while that of the planar pinning decreases. We propose that the decrease of Lorentz-force-independent critical current density with increasing H for H∥I results from the suppression of superconductivity by the magnetic field, The fact that the contribution of volume pinning increases with decreasing $\alpha$ also arises from the suppression of superconductivity in CuO2 plane by the magnetic field.
Received: 07 September 1994
Accepted manuscript online:
Fund: Project supported by the National Center of Research and Development on Superconductivity of China.
Cite this article:
XU XIAO-JUN (许小军), FANG JUN (方军), CAO XIAO-WEN (曹效文), LI KE-BIN (李可斌) ANISOTROPY OF CRITICAL CURRENT DENSITY IN c-AXIS ORIENTED EPITAXIAL YBa2Cu3O7-$\delta$ FILMS 1995 Acta Physica Sinica (Overseas Edition) 4 441
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
