Magnetic properties of La0.67Sr0.33MnO3/YBa2Cu3O7 superlattices -: art. no. 134428

Oxide multilayers composed of ferromagnetic metallic layers of La0.67Sr0.33MnO3 (LSMO) and superconducting cuprate YBa2Cu3O7 (YBCO) were grown on (100) LaAlO3 substrates by high-pressure dc sputtering. We have investigated structural, transport, and magnetic properties of a series of samples in which the layer thickness of LSMO is fixed at 16 unit cells and that of YBCO varied from 1 to 8 unit cells. Exchange-induced unidirectional anisotropy in LSMO/YBCO superlattices has been demonstrated. Observation of an exchange biasing effect in LSMO/YBCO superlattices supports an existence of interlayer exchange coupling between LSMO layers through YBCO superconducting spacer layers.