Volume 63, Number 6, September 2003
|Page(s)||881 - 887|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2003|
Hysteretic behavior of critical currents in heterostructures of high-temperature superconductors and ferromagnets
Max-Planck-Institut für Festkörperforschung - Heisenbergstr. 1 D-70569 Stuttgart, Germany
Accepted: 7 July 2003
We have grown bilayer structures of the ferromagnet and the high-temperature superconductor on single crystalline substrates by pulsed laser deposition. By means of quantitative magneto-optics, the critical current density in the superconducting film is measured and it is found that it strongly depends on the magnetization state of the ferromagnetic layer. The critical current density shows a hysteretic behavior that is strongly related to the magnetic hysteresis loop of the ferromagnet.
PACS: 74.78.Fk – Multilayers, superlattices, heterostructures / 74.25.Qt – Vortex lattices, flux pinning, flux creep / 74.72.Bk – -based cuprates
© EDP Sciences, 2003
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