Vortex pinning regimes in YBa<inf>2</inf>Cu<inf>3</inf>O<inf>7-x</inf> bulk boundaries investigated by quantitative magnetic hall microscopy

E. Bartolomé, B. Bozzo, X. Granados, F. Sandiumenge, T. Puig, X. Obradors

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    5 Citations (Scopus)

    Abstract

    Magnetic Hall probe microscopy in combination with an inverse problem solver was used to simultaneously determine the intragranular and intergranular critical current density dependences on the applied field of YBCO melt-textured welds with [001]-misorientation angles from 0° to 30°. This methodology enabled us to investigate the pinning mechanisms of grain boundary vortices, which evolve from Abrikosov vortices (AVs) to Abrikosov-Josephson vortices (AJVs) and then to Josephson vortices (JVs) as the angle increases. We present a magnetic field versus grain boundary angle phase diagram at 77K in which different intergrain vortex motion regimes can be identified. © 2008 IOP Publishing Ltd.
    Original languageEnglish
    Article number125002
    JournalSuperconductor Science and Technology
    Volume21
    Issue number12
    DOIs
    Publication statusPublished - 1 Dec 2008

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