Parametrically-stimulated recovery of a microwave signal using standing spin-wave modes of a magnetic film

TL;DR

This paper investigates a method for storing and recovering microwave signals in a ferrite film using standing spin-wave modes, combining experimental results with a mean-field theoretical model to understand the process.

Contribution

It introduces a new approach for microwave signal storage and recovery utilizing standing spin-wave modes and develops a mean-field theory to describe the process.

Findings

Successful experimental demonstration of signal storage and recovery.

Theoretical model matches experimental data.

Recovery depends on timing and amplitudes of input and pumping pulses.

Abstract

The phenomenon of storage and parametrically-stimulated recovery of a microwave signal in a ferrite film has been studied both experimentally and theoretically. The microwave signal is stored in the form of standing spin-wave modes existing in the film due to its finite thickness. Signal recovery is performed by means of frequency-selective amplification of one of these standing modes by double- requency parametric pumping process. The time of recovery, as well as the duration and magnitude of the recovered signal, depend on the timing and amplitudes of both the input and pumping pulses. A mean-field theory of the recovery process based on the competitive interaction of the signal-induced standing spin-wave mode and thermal magnons with the parametric pumping field is developed and compared to the experimental data.