The effect of interlayer coupling on critical current density in Bi2212 system

Abstract

The dependences of critical current density Jc on the interlayer coupling strength and magnetic field in Bi2212 crystals were obtained by measuring the magnetic loop of the crystals with different interlayer coupling strengths. It was revealed that Jc decreases with the decrease in the interlayer coupling of the crystals. The relation of Jc ∝ exp(-H^β) was also found in the crystals, and further analysis indicated that it was the result of Zeldov pinning potential model.

Keywords

superconductivity, critical current density, flux pinning, interlayer coupling