Magnetization dynamics in proximity-coupled superconductor-ferromagnet-superconductor multilayers. Part II

TL;DR

This paper investigates how superconducting layers influence magnetization dynamics in superconductor-ferromagnet-superconductor multilayers, revealing a superconducting torque mechanism affecting magnetization precession.

Contribution

It provides experimental evidence for a superconducting torque mechanism driven by kinetic inductance and magnetization precession at interfaces, with detailed resonance spectroscopy analysis.

Findings

Superconducting torque depends on layer thickness.

Experimental support for the kinetic inductance mechanism.

Magnetization dynamics influenced by superconducting layers.

Abstract

In this work, we study magnetization dynamics in superconductor-ferromagnet-superconductor thin-film structures. Results of the broad-band ferromagnetic resonance spectroscopy are reported for a large set of samples with varied thickness of both superconducting and ferromagnetic layers in a wide frequency, field, and temperature ranges. Experimentally the one-dimensional anisotropic action of superconducting torque on magnetization dynamics is established; its dependence on thickness of layers is revealed. It is demonstrated that experimental findings support the recently-proposed mechanism of the superconducting torque formation via the interplay between the superconducting kinetic inductance and magnetization precession at superconductor-ferromagnet interfaces.