Magnetic order in thin films of the heavy fermion superconductor UNi2Al3

Resonant magnetic X-ray scattering was employed to investigate the magnetic state of epitaxial a* oriented thin films of the heavy fermion superconductor UNi2Al3. The observed incommensurate propagation vector as well as the Ne\(\acute{\rm e}\)l temperature correspond to those of bulk samples. The 1200 \({\rm \AA}\) film shows magnetic order with a correlation length >800 A parallel to the growth axis. Out of the three possible magnetic domains the one with the moment direction perpendicular to the film surface is not realized.