Fig. 1

(a) Schematic representation of the multilayered synthetic antiferromagnet. This structure consists of \(N_L\) ferromagnetic layers, each with a thickness \(d_L\), separated by a spacer layer of thickness s. The ferromagnetic film is divided into sublayers of thickness \(d_n\). The sublayers are exchange-coupled with \(J_\textrm{inter}\) if they are at the interfaces in contact with the spacer and with \(J_\textrm{intra}\) if they belong to the same ferromagnetic film. (b) Definition of the local reference system (\(X_n\), \(Y_n\), \(Z_n\)), where \(Y_n = y\) is normal to the multilayer and \(X_n\) lies in the film’s plane. The coordinate \(Z_n\) points along the equilibrium magnetization (\(\textbf{M}_{n}^\textrm{eq}\)) of the n-th ferromagnetic layer.