The anomalous Josephson structures with coupled superconducting and magnetic characteristics allows the manipulation of magnetic properties by Josephson current [1]. In junctions with a strong spin-orbit coupling (φ0 Josephson junction), we demonstrate the appearance of negative differential resistance on the IV characteristic, resulting in an additional locking step of magnetic precession [2]. We show that it is possible to control not only the frequency but also the amplitude of the magnetic precession in the locking region. In addition to this, for junction with electromagnetic coupling as in nanomagnet coupled to Josephson junctions [3, 4], an irregular easy axis reorientation occurs due to several precessional motions that are related to chaotic behavior and orbits with different periodicity in the ferromagnetic resonance region [5]. This opens unique perspectives for the control and manipulation of magnetic moment in hybrid superconducting systems and spintronics devices.

Literature:

[1] M. Shukrinov 2022 Phys.-Usp. 65 317 (2022).
[2] S. A. Abdelmoneim, et al. Phys. Rev. B 106, 014505 (2022).
[3] L. Cai and E. M. Chudnovsky, Phys. Rev. B 82, 104429 (2010).
[4] K. V. Kulikov, et al. Phys. Rev. B 105, 094421 (2022).
[5] M. Nashaat, et al. (Accepted “Chaos Sept. 2022”).