Abstract
We determined the Curie temperature TC for 2–3 monolayers of Co/Cu(100) as a function of Cu-cap thickness by means of temperature-dependent measurements of the initial zero-field AC susceptibility. We see a strong reduction of TC that we discuss in terms of hybridization effects and modifications of the electronic structure of Cu. In addition, we found a small oscillatory contribution that reflects an indirect exchange interaction Jcap in the ultrathin Co films mediated by quantum-well states in the nonmagnetic Cu overlayer. We estimate that Jcap is of the order of 2μeV/atom which corresponds to an oscillation amplitude of 4K as observed in our experiment.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call