Three-dimensional analysis of BaZrO3 pinning centers gives isotropic superconductivity in GdBa2 Cu3 O 7-δ

K. Kaneko, K. Furuya, K. Yamada, S. Sadayama, J. S. Barnard, P. A. Midgley, T. Kato, T. Hirayama, M. Kiuchi, T. Matsushita, A. Ibi, Y. Yamada, T. Izumi, Y. Shiohara

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Abstract

BaZrO3 doped GdBa2 Cu3 O 7-δ superconductor was prepared by pulsed layer deposition using a KrF excimer laser, which showed isotropic characteristics of critical current density, JC, for magnetic-field orientations, ∼4.0× 109 A m-2 at 1.0 T. Microstructural and morphological characterization of resulting artificial pinning centers were conducted by transmission electron microscopy and electron tomography, which confirmed the presence of one-dimensional artificial pinning centers, BaZrO3 nanorods. Since there is noticeable anisotropy from GdBa2 Cu 3 O7-δ superconductor without doping BaZrO 3, the pinning observed for all magnetic-field orientations are due to the high density and high dispersion of these BaZrO3 nanorods with very wide angular distributions.

Original languageEnglish
Article number063901
JournalJournal of Applied Physics
Volume108
Issue number6
DOIs
Publication statusPublished - Sep 15 2010

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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