Originality of resonance and locking phenomena in SFS $\varphi_0$ Josephson junction

TL;DR

This paper explores the interaction and control of two ferromagnetic resonances in a $ ext{SFS } ext{$oldsymbol{ extphi}_0$}$ Josephson junction, revealing new ways to manipulate magnetic and superconducting phenomena.

Contribution

It demonstrates the realization and interplay of Kittel and Buzdin resonances in a $ ext{SFS } ext{$oldsymbol{ extphi}_0$}$ junction, including their transformation and synchronization under external radiation.

Findings

Demonstrated coexistence of Kittel and Buzdin resonances in the junction.

Showed transformation between resonances via external electromagnetic variation.

Achieved double synchronization of magnetic precession and Josephson oscillations.

Abstract

We demonstrate the realization and interplay of two ferromagnetic resonances in one SFS $\varphi_0$ Josephson junction. First resonance that is realized under microwave radiation is the famous Kittel resonance. The other is Buzdin one appearing as a result of interaction of superconducting current and ferromagnetic interlayer magnetization. Transformations of one type of resonance to another under variation of external electromagnetic radiation and the $\varphi_0$ junction parameters open an interesting way to manipulation both of them. The combined ferromagnetic resonance that exhibits the features of both resonances is demonstrated too. The coupling of the Josephson phase with the magnetization of the ferromagnetic layer, caused by the spin-orbit interaction, leads to double synchronization, namely, synchronization of both magnetic precession and Josephson oscillations by external radiation. The obtained results demonstrate reach physics and unique opportunities for various applications.