Exchange Biasing with YMnO3 Epitaxial Films

We report here on the growth of epitaxial YMnO3 thin films on SrTiO3 single crystalline substrates. We show that depending of the choice of the substrate orientation or use of suitable (metallic) buffer layer, the epitaxial texture of the YMnO3 thin films as well as its crystallographic phase (orthorhombic or hexagonal) can be selected. Antiferromagnetic YMnO3 films have been also grown on ferromagnetic SrRuO3 epitaxial layers. Magnetic measurements show the existence of an exchange bias in orthorhombic films.