Growth and magnetic characterization of Mn films and superlattices on Ag(001)

We have grown single-crystal Mn films and coherent (Mn/Ag) superlattices on Ag(001) and characterized the magnetic behavior with temperature-dependent ferromagnetic resonance and magnetic susceptibility measurements. We find that the Mn films exhibit a 2.89-Å square surface net identical to that of Ag(001), and a tetragonal structure similar to that of quenched $\gamma$-Mn. The (Mn/Ag) superlattices exhibit a well-defined high-angle x-ray-diffraction satellite structure. We detect no significant ferromagnetic contribution at temperatures down to 5 K, and conclude that the Mn is antiferromagnetically ordered.