Comparison of ac susceptibility of YBa<inf>2</inf>Cu<inf>3</inf>O <inf>7</inf> coated conductors and single crystals

D. X. Chen, E. Pardo, A. Sanchez, A. Palau, T. Puig, X. Obradors

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20 Citations (Scopus)

Abstract

The complex ac susceptibility of YBa2Cu3O 7 (YBCO) coated conductor and YBCO single crystal has been measured at 77 K as a function of field amplitude and frequency, from which the E(J) characteristic is deduced. It is shown that the E(J) in the single crystal obeys a power law in a large range above Ec= 1 μV/cm, indicating a flux creep mechanism, whereas for the coated conductor there appears a transition from flux creep to flux flow at E∼10Ec. The reported contactless technique may be conveniently used for the research and development of coated conductors. © 2004 American Institute of Physics.
Original languageEnglish
Pages (from-to)5646-5648
JournalApplied Physics Letters
Volume85
Issue number23
DOIs
Publication statusPublished - 6 Dec 2004

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