Discontinuity lines in rectangular superconductors with intrinsic and extrinsic anisotropies

Th. Schuster; H. Kuhn; M. V. Indenbom

doi:10.1103/PhysRevB.52.15621

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Discontinuity lines in rectangular superconductors with intrinsic and extrinsic anisotropies

Th. Schuster, H. Kuhn, M. V. Indenbom

DOI 10.1103/PhysRevB.52.15621 · Physical Review B

T1

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Abstract

Magneto-optical investigations of the flux distributions in the critical state of a c-axis-oriented square YBa2Cu3O7−δ thin film with an extrinsic anisotropy induced by an in-plane magnetic field are presented. The dependence of the anisotropy ratio of the critical currents on the orientation of the in-plane field with respect to the direction of current flow is determined. The results are compared with flux distributions in a rectangular DyBa2Cu3O7−δ single crystal with a microstructural anisotropy induced by the introduction of oblique linear defects. For the intrinsic anisotropy the flux is found to penetrate parallel to the inclination direction of the pins even if the flux motion is then not parallel to the Lorentz force exerted by the shielding currents. The angular distribution of the critical currents in general is different from the elliptic distribution, which was found for the extrinsic anisotropy.

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
DyBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown