Magnetism and Optical Transparency in Ru-doped BaSnO3 Epitaxial Thin Films

Abstract

We have stabilized epitaxial oxide thin films of transparent, magnetic Ru-doped BaSnO3. Films were grown by pulsed laser deposition and exhibited excellent epitaxy and crystallinity as determined by x-ray diffraction. Epitaxial films of Ru doped BaSnO3 were grown with a ceramic target of nominally 4% Ru doping on the Sn site but resulted in 3% Ru doping in the films. Paramagnetic behavior is observed in all films with a Curie law dependence on temperature. The field dependence of the magnetization shows a paramagnetic moment that saturates at a value consistent with low spin Ru. Films are also found to be transparent in the visible regime. Together these results demonstrate the realization of highly crystalline, transparent, paramagnetic, epitaxial doped BaSnO3 films.