Abstract

Magnetic measurements on a La 2/3Ca 1/3MnO 3/YBa 2Cu 3O 7/La 2/3Ca 1/3MnO 3 trilayer were performed with the field applied parallel to the plane of the film. Ferromagnetic transition is at about 125 K and the superconducting transition was suppressed to 60 K. The thicknesses of LCMO and YBCO layers were 50 nm and 20 nm, respectively. We observed an evidence for the ferromagnetic-like interaction between the two LCMO layers. We proposed a coupling mechanism mediated by London screening currents to explain our observations.

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