Static and dynamic magnetic properties of Fe-Cr-layered structures with antiferromagnetic interlayer exchange

Thin films of Fe when separated by approximately 8 Å of Cr couple antiferromagnetically. Evidence for this comes from spin-wave-mode spectra as measured by means of light scattering and hysteresis curves, here obtained by means of the magneto-optic Kerr effect. Based on new and more-detailed data we would like to discuss the behavior of a particular spin-wave mode due to the spin canting induced by the antiferromagnetic coupling. It is related to a Goldstone mode. The experiments also show that antiferromagnetic coupling occurs not only for films grown along 100 but also for films grown along 110. We discuss the implications of this observation.