Физика Низких Температур: Том 46, Выпуск 9 (Сентябрь 2020), c. 1102-1109 ( к оглавлению , назад )
Peculiarities of IV-characteristics and magnetization dynamics in the φ0 Josephson junction
Yu. M. Shukrinov1,2,3, I. R. Rahmonov1,4, and A. E. Botha3
1BLTP, Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia
2Dubna State University, Dubna 141980, Russia
3Department of Physics, University of South Africa, Florida, Johannesburg 1710, South Africa
4Umarov Physical Technical Institute, TAS, Dushanbe 734063, Tajikistan
Received June 9, 2020, published online July 22, 2020
The φ0 junction demonstrates a rich variety of dynamical states determined by parameters of the Josephson junction and the intermediate ferromagnetic layer. Here we find several peculiarities in the maximal amplitude of magnetic moment m̂y, taken at each value of the bias current, which we correlate to the features of the IV-characteristics of the φ0 junction. We show that a kink behavior in the bias current (voltage) dependence of m̂y along the IV-characteristics is related to the changes in the dynamical behavior of the magnetization precession in the ferromagnetic layer. We also demonstrate a transformation of the magnetization specific trajectories along the IV-curve, magnetization composite structures, and hysteretic behavior in the bias current dependence of m̂y. Due to the correlations between features of m̂y and the IV-characteristics, the presented results open a way for the experimental testing of the peculiar magnetization dynamics which characterize the φ0 junction.
Key words: Josephson SFS junction, IV-characteristics, current-phase relation.