Magnetically memorable inductance in superconducting multilayer resonators

R. Tyumenev; D. S. Kalashnikov; B. V. Fradkin; A. A. Neilo; A. G. Shishkin; N. V. Klenov; I. I. Soloviev; A. A. Golubov; M. Yu. Kupriyanov; I. A. Golovchanskiy; V. S. Stolyarov; A. S. Sidorenko; S. V. Bakurskiy

arXiv · 2607.21147

Magnetically memorable inductance in superconducting multilayer resonators

R. Tyumenev·D. S. Kalashnikov·B. V. Fradkin·A. A. Neilo·A. G. Shishkin·N. V. Klenov·I. I. Soloviev·A. A. Golubov·M. Yu. Kupriyanov·I. A. Golovchanskiy·V. S. Stolyarov·A. S. Sidorenko·S. V. Bakurskiy

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Abstract

Superconductor-ferromagnet hybrid structures with tunable kinetic inductance are promising elements for neuromorphic and quantum computing circuits. We report the fabrication and microwave characterization of split-ring resonators based on Nb/Co/Nb/Co/Nb/Al spin-trigger multilayers and demonstrate a non-volatile spin-valve effect on their resonant properties. Reversal of the relative magnetization orientation of the cobalt layers produces a reproducible shift of the resonant frequency up to 4 MHz at zero applied magnetic field, corresponding to a change in the kinetic inductance of the structure. The incorporation of a proximitized aluminum overlayer is shown to enhance the inductance contrast between the parallel and antiparallel magnetic states by a factor of approximately three relative to structures without this layer. The experimental results are in quantitative agreement with a microscopic model based on the Usadel equations. The demonstrated magnetic memory of the resonant frequency at zero field establishes spin-trigger multilayers as viable field-programmable inductive elements for superconducting digital and neuromorphic circuits.

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R. Tyumenev, D. S. Kalashnikov, B. V. Fradkin, A. A. Neilo, A. G. Shishkin, N. V. Klenov, I. I. Soloviev, A. A. Golubov, M. Yu. Kupriyanov, I. A. Golovchanskiy, V. S. Stolyarov, A. S. Sidorenko, S. V. Bakurskiy. 2026-07-23. Magnetically memorable inductance in superconducting multilayer resonators. https://arxiv.org/abs/2607.21147

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