Resonant control of magnetization in a shunted φ0 junction with LC circuit

Abstract

The possibility of resonant control of magnetization in a Josephson superconductor–ferromagnet–superconductor φ0 junction shunted by an LC circuit is demonstrated. As a result of the resonance of Josephson oscillations with oscillations in the circuit, a time-independent superconducting current arises in the junction. Due to the coupling of the Josephson phase and the magnetization of the ferromagnetic layer, the resulting superconducting current leads to a deviation of the easy axis from its initial position and to a precession of the magnetization around the tilted axis. We show that the tilt value increases with increasing spin–orbit interaction and the Josephson to magnetic energy ratio. An analytical expression for the magnetization tilt is obtained, which agrees well with the results of numerical calculations. The emerging possibility of resonant control of magnetization in a shunted φ0 junction can be used in the development of prospective technologies in the field of superconducting electronics and spintronics.