Ferromagnetic resonance with long Josephson junction

In this work we propose a hybrid device based on a long Josephson junction coupled inductively to an external ferromagnetic layer. The long Josephson junction in a zero-field operation mode induces a localized AC magnetic field in the ferromagnetic layer and enables a synchronized magnetostatic standing wave. The magnetostatic wave induces additional dissipation for soliton propagation in the junction and also enables a phase locking (resonant soliton synchronization) at frequency of natural ferromagnetic resonance. The later manifests itself as an additional constant voltage steps on the current-voltage characteristics at the corresponding voltage. The proposed device allows to study magnetization dynamics of individual micro-scaled ferromagnetic samples using just DC technique, and also it provides additional phase locking frequency in the junction, determined exclusively by characteristic of the ferromagnet.