ISSN:
1434-6036
Keywords:
PACS. 74.72.Bk Y-based cuprates – 74.60.Ge Flux pinning, flux creep, and flux-line lattice dynamics – 74.25.Nf Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.)
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: We report complex impedance measurements in an untwinned YBaCuO crystal. Our broad frequency range covers both the quasi static response and the resistive response of the vortex lattice. It allow us to characterize the irreversibility line without the need of any frequency dependent pinning parameters. We confirm the validity of the two modes model of vortex dynamic, and extract both the surface critical current and the flux flow resistivity around the first order transition Tm. This latter is identified by the abrupt loss of pinning and by an unexpected step of (T) at Tm.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1140/epjb/e2003-00167-6
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