Tilt angle dependences of vortex structure and critical current density at low-angle grain boundaries in YBa2Cu3O7x films

Tomoya Horide, Kaname Matsumoto, Yutaka Yoshida, Masashi Mukaida, Ataru Ichinose, and Shigeru Horii
Phys. Rev. B 77, 132502 – Published 7 April 2008

Abstract

A tilt angle dependence of vortex structure was studied at low-angle grain boundaries (LAGBs) in YBa2Cu3O7x films. The 2° tilt LAGB did not degrade Jc of the film in a self-field, demonstrating the existence of Abrikosov vortices at the 2° LAGB. The magnetic field dependence of the flux flow resistance indicated the existence of Abrikosov Josephson vortices at the 5° tilt LAGB. At the 10° tilt LAGB, a Josephson junction behavior was observed in a self-field, indicating the existence of Josephson vortices. The influence of the LAGBs on critical current density was understood based on these vortices.

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  • Received 16 August 2007

DOI:https://doi.org/10.1103/PhysRevB.77.132502

©2008 American Physical Society

Authors & Affiliations

Tomoya Horide* and Kaname Matsumoto

  • Department of Materials Science and Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan

Yutaka Yoshida

  • Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8603, Japan

Masashi Mukaida

  • Department of Material Science and Engineering, Kyushu University, Fukuoka 819-0395, Japan

Ataru Ichinose

  • Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry, Yokosuka 240-0196, Japan

Shigeru Horii

  • Department of Applied Chemistry, University of Tokyo, Tokyo 113-8656, Japan

  • *Corresponding author; FAX: +81-75-753-5486; tomoya.horide@t04.mbox.media.kyoto-u.ac.jp

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Issue

Vol. 77, Iss. 13 — 1 April 2008

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