Phys. Rev. Lett. 70, 998–1001 (1993)Observation of free flux flow at high dissipation levels in YBa2Cu3O7-δ epitaxial filmsSee Also: Erratum Received 25 September 1992; published in the issue dated 15 February 1993 The total resistivity (ρ=E/J not dE/dJ) was measured in epitaxial YBa2Cu3O7-δ films up to high dissipation levels using a pulsed current source. In the reversible region, ρ(J) has an ssS shape; it is Ohmic at low J (thermally activated free-flux motion), goes through a nonlinear transition region (depinning), and becomes Ohmic again at the highest J (free flux flow, i.e., purely viscous motion). The free-flux-flow resistivity ρfff obeys ρfff/ρn≃H/Hc2(T), with dHc2/dT≊2 I/K. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.70.998
DOI:
10.1103/PhysRevLett.70.998
PACS:
74.60.Ge, 74.40.+k, 74.60.Ge, 74.72.Bk
See AlsoErratum: Milind N. Kunchur, David K. Christen, and Julia M. Phillips, Observation of Free Flux Flow at High Dissipation Levels in YBa2Cu3O7-δ Epitaxial Films, Phys. Rev. Lett. 70, 2356 (1993). |
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