Local electrical characterization of resonant magnetization motion in a single ferromagnetic sub-micrometer particle in lateral geometry

TL;DR

This paper presents a detailed electrical characterization of magnetization motion in a single sub-micrometer ferromagnetic particle using GHz frequency techniques, applying the Stoner-Wohlfarth model to extract magnetization parameters.

Contribution

It demonstrates the applicability of the Stoner-Wohlfarth model to a large aspect ratio ferromagnetic nano-structure in lateral geometry for the first time.

Findings

Correlation between high frequency inductive currents and local magnetization.

DC voltage at resonance explained by the model.

Validation of the Stoner-Wohlfarth model for nano-structures.

Abstract

In this article a detailed characterization of a magnetization motion in a single sub-micrometer and multi-terminal ferromagnetic structure in lateral geometry is performed in a GHz regime using direct DC characterization technique. We have shown applicability of the Stoner-Wohlfarth model to the magnetic nano-structure with large length to with ratio. Applying the model to experimental data we are able to extract relevant magnetization motion parameters and show a correlation between high frequency inductive currents and local magnetization. Additionally, DC voltage generated over the structure at the resonance, with external magnetic field under an angle to the shape anisotropy axis, is explained by the model.