Directional Field-Dependence of Magnetoimpedance Effect on Integrated YIG/Pt-Stripline System.

Arthur L R Souza,Filipe Vaz,Alexandre B De Oliveira,Marcio A Correa,Felipe Bohn,Matheus Gamino,Armando Ferreira

doi:10.3390/s21186145

Arthur L R Souza, Filipe Vaz + Show 5 more

Open Access

https://doi.org/10.3390/s21186145

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Abstract

We investigated the magnetization dynamics through the magnetoimpedance effect in an integrated YIG/Pt-stripline system in the frequency range of 0.5 up to 2.0 GHz. Specifically, we explore the dependence of the dynamic magnetic behavior on the field orientation by analyzing beyond the traditional longitudinal magnetoimpedance effect of the transverse and perpendicular setups. We disclose here the strong dependence of the effective damping parameter on the field orientation, as well as verification of the very-low damping parameter values for the longitudinal and transverse configurations. We find considerable sensitivity results, bringing to light the facilities to integrate ferrimagnetic insulators in current and future technological applications.

Highlights

The giant magnetoimpedance (MI) effect corresponds to the strong variation of the electrical impedance of a soft magnetic material when submitted to an external magnetic field [1,2,3,4,5,6,7,8,9]
We have explored the dependence of dynamic magnetic behavior on field orientation
We have estimated magnetic parameters that are fundamental for a sensor element, such as the effective magnetization and the effective damping parameter

Summary

Introduction

The giant magnetoimpedance (MI) effect corresponds to the strong variation of the electrical impedance of a soft magnetic material when submitted to an external magnetic field [1,2,3,4,5,6,7,8,9]. Recently, it has been shown that the growth of YIG/NM heterostructures, where NM is a non-ferromagnetic metal such as Ag, Cu, and W [30,31], may act as a way to circumvent this adversity and perform investigations on magnetization dynamics through the MI effect in the low frequency regime In these previous works, the YIG/NM heterostructures were entirely produced by using the Magnetron Sputtering technique. The modification of the YIG deposition technique (allowing for increased thickness) and the use of Pt material can bring interesting results, mainly in the MI response at moderate- and high-frequency regime For these heterostructures, beyond obtaining from the MI measurements important magnetic parameters such as effective magnetization Me f f and effective damping parameters αe f f , fingerprints of the FMR effect have been identified. The observed high MI sensitivity and the experimental setup employed here turn easy to integrate ferrimagnetic insulators in current and future technological applications

Experiment

Results and Discussion

Conclusions