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Flux line dynamics in crystal YBa2Cu3O7−δ studied by mechanical measurements

✍ Scribed by S. de Brion; R. Calemczuk; J.Y. Henry

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
459 KB
Volume
178
Category
Article
ISSN
0921-4534

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✦ Synopsis

We have studied the flux line dynamics and its anisotropy in a crystal YBa2Cu30 x as a function of the magnetic field and the oxygen content; 0.5 T<H< 7 T, x=6.9 and 6.6. At low temperature, the observed behavior is in agreement with a pinned flux line lattice. A residual dissipation appears depending both on x and H. The irreversibility line was also investigated: for H± c, the line remains steep and close to Tc whereas for HFIc, it moves apart in particular as x is decreased with Hzc ( 1 -(T/T~) )3/2. These results are interpreted within the model of thermally activated flux flow.

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