Epitaxial growth and magnetic properties of the first five members of the layered $Srn+1RunO3n+1$ oxide series

Epitaxial thin films of the $n=1–5$ members of the layered $Srn+1RunO3n+1$ oxide series were produced by reactive molecular-beam epitaxy. X-ray diffraction and high-resolution transmission electron microscopy confirm that these films are epitaxially oriented and nearly phase pure $(>98%)$⁠. The $Sr2RuO4$ $(n=1)$ and $Sr3Ru2O7$ $(n=2)$ samples show no ferromagnetic transition in the range from $5to300K$⁠, while the $Sr4Ru3O10$ $(n=3)$⁠, $Sr5Ru4O13$ $(n=4)$⁠, and $Sr6Ru5O16$ $(n=5)$ samples show ferromagnetic transitions at 85, 95, and $130K$⁠, respectively.