Effect of deoxygenation on the vortex dynamics in RBa2Cu3O7−δ high-temperature superconductors
G. K. Perkins, L. F. Cohen, A. A. Zhukov, A. D. Caplin
DOI 10.1103/PhysRevB.55.8110 · Physical Review B
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Abstract
A model-independent analysis of magnetization loop scaling is used to study the vortex behavior in a set of RBa2Cu3O7−δ (RBCO, R=Y, Tm) single crystals of differing oxygen content (0.1<δ<0.5). Throughout the range of oxygen content studied, the qualitative behavior of the vortex dynamics remains the same, and is characterized by two power law exponents m and n relating to the magnetic field dependences of a current scale J0(B,T,δ) and an energy scale U0(B,T,δ), respectively. We find that m∼1 and n∼-1 for all the samples studied, suggestive of plastic rather than elastic deformation of the vortex lattice. The magnitude of U0(B,T,δ) has a significant dependence on oxygen content, while J0(B,T,δ) remains almost constant.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | unknown |
| TmBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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