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Resistive state of SFS Josephson junctions in the presence of moving domain walls

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arxiv 1904.03449 v2 pith:DY6ZOTTS submitted 2019-04-06 cond-mat.supr-con

D. S. Rabinovich , I. V. Bobkova , A. M. Bobkov , M. A. Silaev This is my paper · ORCID
classification cond-mat.supr-con
keywords domainwallcurrentdynamicsjosephsonjunctionmagnetizationpresence
verification ladder T0 review T1 audit T2 compute T3 formal
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We describe resistive states of the system combining two types of orderings - superconducting and ferromagnetic one. It is shown that in the presence of magnetization dynamics such systems become inherently dissipative and in principle cannot sustain any amount of the superconducting current because of the voltage generated by the magnetization dynamics. We calculate generic current-voltage characteristics of a superconductor/ferromagnet/superconductor Josephson junction with an unpinned domain wall and find the low-current resistance associated with the domain wall motion. We suggest the finite slope of Shapiro steps as the characteristic feature of the regime with domain wall oscillations driven by the ac external current flowing through the junction.

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  1. Resonant control of magnetization in a shunted $\varphi_0$ junction with LC circuit

    cond-mat.supr-con 2024-11 conditional novelty 4.0 of 10

    In a shunted phi0 Josephson junction, LC resonance produces a steady supercurrent that tilts the magnetization by m_y = G r I_s, offering an electrical control knob for the magnet.

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