Journal
APPLIED PHYSICS LETTERS
Volume 82, Issue 5, Pages 778-780Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1542674
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Flux pinning in high-temperature superconductors such as YBa2Cu3O7-x (YBCO) in the past has been accomplished by pinning the vortex cores. We demonstrate magnetic-domain-induced flux pinning of the magnetic flux of vortices in a ferromagnet-superconductor bilayer consisting of CoPt grown on YBCO, where the ferromagnet has uniaxial perpendicular magnetic anisotropy and a random domain structure. We observe an improvement of the critical current due to magnetic pinning at temperatures close to the transition temperature. (C) 2003 American Institute of Physics.
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