Effects of the vortex line shape on the critical current density in high T_c superconducting film with nanorod pinning centers

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In this Subject: <a title="Electricity & Magnetism" href="/content/subcat;jsessionid=bco6rj8tkhnmh.alice?j_subject=227&j_availability=">Electricity & Magnetism
By this author: Jung, Y. ;&nbsp; Kwak, K. ;&nbsp; Lee, W. ;&nbsp; Rhee, J. ;&nbsp; Youm, D. ;&nbsp; Yoo, J. ;&nbsp; Han, Y.H. ;&nbsp; Park, B.J.

Authors: Jung, Y.; Kwak, K.; Lee, W.; Rhee, J.; Youm, D.; Yoo, J.; Han, Y.H.; Park, B.J.

Source: Superconductor Science and Technology, Volume 25, Number 6, June 2012 , pp. 65001-65008(8)

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Abstract:

We studied the critical current density distribution in a coated conductor comprised of (Gd,Y)₁Ba₂Cu₃O_7−δ-BaZrO₃ film. Transmission electron microscopy measurements showed that nanorod pinning centers tilt by ∼13° from the c-axis. Magneto-optical image (MOI) measurements showed interesting asymmetric distributions of magnetic flux density. From MOIs we calculated the asymmetric distributions of the critical current density, which is associated with the properties of vortex pinning. We were able to explain these results through the geometrical relationship of the tilted rod pinning centers and the curved vortex lines.

Document Type: Research article

DOI: http://dx.doi.org/10.1088/0953-2048/25/6/065001

Publication date: 2012-06-01