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. 2023 Feb 21:14:233-239.
doi: 10.3762/bjnano.14.22. eCollection 2023.

Spin dynamics in superconductor/ferromagnetic insulator hybrid structures with precessing magnetization

Yaroslav V Turkin  1   2 , Nataliya Pugach  1
Affiliations

Spin dynamics in superconductor/ferromagnetic insulator hybrid structures with precessing magnetization

Yaroslav V Turkin et al. Beilstein J Nanotechnol. .

Abstract

The main goal of the present work is the description of the dynamics of spin current and induced magnetization inside a superconducting film S that is in contact with a ferromagnetic insulator layer FI. Spin current and induced magnetization are calculated not only at the interface of the S/FI hybrid structure, but also inside the superconducting film. The new and interesting predicted effect is the frequency dependence of the induced magnetization with a maximum appearing at high temperatures. It is also shown that the increase of the magnetization precession frequency can drastically change the spin distribution of quasiparticles at the S/FI interface.

Keywords: ferromagnetic resonance; proximity effect; superconducting spintronics.

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Figures

Figure 1
Figure 1
The investigated hybrid superconducting structure consisting of a ferromagnetic insulator (FI) adjacent to a superconductor (SC). The interface between the superconducting layer and free space is located at z = 0; the interface between the superconducting layer and the ferromagnetic insulator is located at z = Lsc. The magnetization m in the ferromagnetic insulator layer is uniform and precesses with the cyclic frequency Ω.
Figure 2
Figure 2
Distributions of the spin current density inside the superconducting layer at different frequencies of the magnetization precession. The interface between the superconducting layer and ferromagnetic insulator is located at z = 3ξ
Figure 3
Figure 3
In-plane component of the induced magnetization at the S/FI interface as a function of the magnetic precession frequency at different temperatures.
Figure 4
Figure 4
Evolution of the spin-resolved distribution function at the S/FI interface (Sx component in the upper panels and Sy component in the lower panels) at magnetization precession frequencies of (a) 1 GHz and (b) 8 GHz. The normalized time is equal to t/Tτ, where Tτ = 2π/Ω is the period of magnetization precession.
Figure 5
Figure 5
Snapshots of the spin distribution function at different moments of the precession period at a frequency of 8 GHz.
See this image and copyright information in PMC

References

    1. Linder J, Robinson J W A. Nat Phys. 2015;11:307–315. doi: 10.1038/nphys3242. - DOI
    1. Chumak A V, Serga A A, Hillebrands B. Nat Commun. 2014;5:4700. doi: 10.1038/ncomms5700. - DOI - PMC - PubMed
    1. Cornelissen L J, Liu J, van Wees B J, Duine R A. Phys Rev Lett. 2018;120(9):097702. doi: 10.1103/physrevlett.120.097702. - DOI - PubMed
    1. Golovchanskiy I A, Abramov N N, Stolyarov V S, Bolginov V V, Ryazanov V V, Golubov A A, Ustinov A V. Adv Funct Mater. 2018;28:1802375. doi: 10.1002/adfm.201802375. - DOI
    1. Jeon K-R, Ciccarelli C, Kurebayashi H, Wunderlich J, Cohen L F, Komori S, Robinson J W A, Blamire M G. Phys Rev Appl. 2018;10:014029. doi: 10.1103/physrevapplied.10.014029. - DOI

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