Authors: Lai Jiang WeiWei Xu Tao Hua Mei Yu DeYue An Jian Chen BiaoBing Jin Lin Kang PeiHeng Wu
Publish Date: 2014/12/03
Volume: 58, Issue: 3, Pages: 493-498
Abstract
We firstly described a simulation model to investigate the influence of grain boundary GB on the vortex transport properties in YBCO film It is found that the size of inhomogeneous area caused by GB as well as the average velocity in transverse and longitudinal directions shows an angular dependence when the angle θ between the GB and the sample edge varies We have also studied the impact of magnetic field intensity on dynamic behavior of vortex lattice and found that a lower vortex density makes it difficult for the vortex lattice to transfer from pinning state to flow state As the magnetic field is decreased beyond a critical value sharp jumps and strong fluctuations were observed in the I–V curve Finally we conducted measurements on a thin film YBa2Cu3O7δ with an individual artificial grain boundary to support the simulation process
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