Suppression of Superconductivity in YBCO/LCMO Superlattices

Details Suppression of Superconductivity in YBCO/LCMO Superlattices Suppression of Superconductivity in YBCO/LCMO Superlattices

2003-12-11

arxiv.org/abs/cond-mat/0312280v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1016/j.ssc.2004.05.028

The competition of superconductivity and magnetism in superlattices composed of alternating YBa$_2$Cu$_3$O$_{7-d}$ and La$_{0.67}$Ca$_{0.33}$MnO$_{3}$ thin films is investigated using low-energy optical spectroscopy. The thickness of the superconducting YBCO layers is varied from 30 nm to 20 nm while the thickness of the magnetic LCMO layers is kept constant at 20 nm. We clearly observe that the superconducting condensate density in the superconducting state of superlattice is drastically reduced by the magnetic subsystem which may be connected with proximity effects that distort the gap symmetry and thus suppress superconductivity.

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