Fizika Nizkikh Temperatur: Volume 46, Number 9 (September 2020), p. 1102-1109    ( to contents , go back )

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
E-mail: shukrinv@theor.jinr.ru

Received June 9, 2020, published online July 22, 2020

Abstract

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 y, 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 y 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 y. Due to the correlations between features of y 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.

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