Abstract
The oxide heterostructures composed of superconducting YBa2Cu3O7 bottom layer, the overlying ferromagnetic La1−xSrxMnO3 film and SrTiO3 as ultrathin (d ≈ 5 nm) barrier were grown heteroepitaxially onto LaAlO3 substrates by applying pulsed liquid injection metalorganic chemical vapour deposition technique. We report anomalous interface resistance increase with cooling just below superconductive transition temperature (Tc ∼= 85 K) and enhanced suppression of supercurrent of strip-like YBa2Cu3O7 film due to spin-polarized carriers injected from the ferromagnetic manganite layer.
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