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

Yaroslav V Turkin; Nataliya Pugach

doi:10.3762/bjnano.14.22

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

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

Authors

Yaroslav V Turkin^{1

2}, Nataliya Pugach¹

Affiliations

¹ HSE University, Moscow 101000, Russia.
² Vernadsky Crimean Federal University, Simferopol 295007.

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.

Grants and funding

The induced magnetization calculation was financially supported by the Ministry of Science and Higher Education of the Russian Federation, Megagrant project N 075-15-2022-1108. The calculations of the non-equilibrium spin current were supported by the Russian Science Foundation project 23-72-00018 “Study of non-equilibrium and boundary phenomena in superconducting hybrid nanostructures”. Investigation of the quasiparticle distribution and dynamics was supported by the Basic Research Program of HSE.