Interface Effects on Magnetic Flux Pinning in LaSrMnO/YBa CuO Bilayers.

The magnetic pinning properties of a ferromagnet/superconductor hybrid structure consisting of a LaSrMnO(LSMO) layer with various thicknesses on top of a fixed thickness YBaCuO (YBCO) layer are investigated in this article. The existence of a weakly magnetic layer was identified at the interface between YBCO and LSMO by a ferromagnetic resonance (FMR) study. Magnetic moment and anisotropy of the interfacial layer were probed using the angular-dependent FMR study.