Impact Factor:2.8
Journal:Physica B Condensed Matter
Abstract:Recent researches highlight the additional anisotropic crystallographic axis within the superconducting plane of high temperature superconductors (HTS), demonstrating the superconducting anisotropy of HTS is better understood in the biaxial frame than the previous uniaxial coordinates within the superconducting layer. To quantitatively evaluate the anisotropy of flux pinning and critical current density in HTS, we extend the scaling rule for single-vortex collective pinning in uniaxial superconductors to account for flux-bundle collective pinning in biaxial superconductors. The scaling results show that in a system of random uncorrected point defects, the field dependence of the critical current density is described by a unified function with the scaled magnetic field of the isotropic superconductor. The obtained angular dependence of the critical current density depicts the main features of experimental observations, considering possible corrections due to the strong-pinning interaction.
Co-author:Guozheng Kang,Yuanwen Gao
Correspondence Author:Yingxu Li
Discipline:Science
Volume:491
Page Number:70-78
Translation or Not:no
Date of Publication:2016-03-01
Included Journals:SCI