The magnetoelastic coupling and magnetic anisotropy energy (MAE) of (i) an uncovered and (ii) a Cu-capped Co overlayer on Cu(001) are determined employing a self-consistent relativistic spin-polarized version of the total-energy full-potential linearized augmented plane-wave (FLAPW) method and the magnetic torque method. Layer-resolved contributions to the magnetoelastic coupling and MAE are obtained. We find surface magnetoelastic coupling coefficients to be positive for the Co layer and negative for the Cu substrate and cap layers. A substantial difference of magnetoelastic coupling coefficients for thin films as opposed to bulk is demonstrated, which causes a negative magnetostriction coefficient (λ001) for uncovered Co overlayer and a positive λ001 for the Cu-capped Co overlayer on Cu(001).
ASJC Scopus subject areas
- Physics and Astronomy(all)