Ac susceptibility of a melt-textured y Ba2 Cu3 Ox ring closed by a strong-coupling contact

D. X. Chen, E. Pardo, A. Sanchez

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Abstract

The complex ac susceptibility = ′ -j ″ of a melt-textured Y Ba2 Cu3 Ox ring closed by a strong-coupling contact is measured after zero-field cooling to 77 K as a function of the ac field amplitude Hm and frequency f. The resulting (Hm, f) is similar to that derived from a power-law relation between the local current density and electric field but with maximum ″ (Hm) increasing steadily with increasing f, which is explained by the creep of Abrikosov-Josephson vortices along the contact driven by the London force of supercurrents and the Lorentz force of the induced normal currents. © 2007 American Institute of Physics.
Original languageEnglish
Article number012506
JournalApplied Physics Letters
Volume91
Issue number1
DOIs
Publication statusPublished - 19 Nov 2007

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