ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We have studied the driven vortex lattice in untwinned, clean YBa 2 Cu 3 O 7−δ single crystals, showing the first order (melting) transition T m . At high enough driving currents (j ∼ 10 3 A/cm 2 , j ≳ j c ) and temperatures T 〈 T m , a clear distinction is found between two different behaviours of the moving vortex lattice. The onset of dissipation is characterized by a noisy flux creep with a temperature independent activation energy U(j). At higher temperatures, the creep regime crosses over into a flux flow regime with linear resistivity. Apart from the dip in resistivity at T m , associated with the peak effect and usually assigned to a softening of the shear modulus, the resistivity of the flowing flux lattice continuously extends into the vortex-liquid.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022517011159
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