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arXiv · 1804.05391

Re-orientation of easy axis in $\varphi_0$ junction

Yu. M. Shukrinov·A. Mazanik·I. R. Rahmonov·A. E. Botha·A. Buzdin
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Abstract

We study theoretically a dynamics of $\varphi_0$ junction with direct coupling between magnetic moment and Josephson current which shows features close to Kapitza pendulum. We have found that starting with oscillations along $z$-axis, the character of magnetization dynamics changes crucially and stable position of magnetic moment $\vec m$ is realized between $z-$ and $y$-axes depending on parameters of the system. Changes in critical current and spin-orbit interaction lead to the different stability regions for magnetization. An excellent agreement between analytical and numerical results is obtained for low values of the Josephson to magnetic energy ratio.

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Yu. M. Shukrinov, A. Mazanik, I. R. Rahmonov, A. E. Botha, A. Buzdin. 2018-04-15. Re-orientation of easy axis in $\varphi_0$ junction. https://doi.org/10.1209/0295-5075%2F122%2F37001

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