Distribution of activation energies for thermally activated flux motion in high-Tc superconductors: An inversion scheme

C. W. Hagen; R. Griessen

doi:10.1103/PhysRevLett.62.2857

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Distribution of activation energies for thermally activated flux motion in high-Tc superconductors: An inversion scheme

C. W. Hagen, R. Griessen

DOI 10.1103/PhysRevLett.62.2857 · Physical Review Letters

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Abstract

Within a thermally activated flux-motion model we derive an exact inversion scheme which makes it possible to calculate the distribution m(E*) of activation energies E* for flux motion from experimental magnetic relaxation data M(t,T). The distributions determined from relaxation data for polycrystalline and single-crystalline YBa2Cu3O7−δ strongly resemble a log-normal distribution function. The results show that within this model existing data imply that structural disorder is present in both ceramic and single-crystalline samples.

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.	—	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown