# Signal Enhancement in Magnetoelastic Ribbons Through Thermal Annealing: Evaluation of Magnetic Signal Output in Different Metglas Materials

## TL;DR

This study shows how thermal annealing affects the magnetic signal output of three Metglas ribbons, revealing differences in enhancement and stability.

## Contribution

The paper provides a comparative analysis of thermal annealing effects on three Metglas alloys for magnetoelastic sensing.

## Key findings

- 2826MB3 and 2605SA1 showed similar magnetic signal enhancements, with 75.8% and 70% increases, respectively.
- 2714A achieved the highest enhancement at 86.8% but was highly sensitive to over-annealing.
- Annealing parameters significantly influence the stability and sensitivity of magnetoelastic sensors.

## Abstract

This study explores the impact of thermal annealing on the magnetic signal enhancement of three distinct Metglas ribbon materials: 2826MB3, 2605SA1, and 2714A. Each material underwent a systematic annealing process under a range of temperatures (50–500 °C) and durations (10–60 min) to evaluate the influence of thermal treatment on their magnetic signal response. The experimental setup applied a constant excitation frequency of 20 kHz, allowing for direct comparison under identical measurement conditions. The results show that while all three alloys benefit from annealing, their responses differ in magnitude, stability, and sensitivity. The 2826MB3 and 2605SA1 ribbons exhibited similar enhancement patterns, with maximum normalized voltage increases of 75.8% and approximately 70%, respectively. However, 2605SA1 displayed a more abrupt signal drop at elevated temperatures, suggesting reduced thermal stability. In contrast, 2714A reached the highest enhancement at 86.8% but also demonstrated extreme sensitivity to over-annealing, losing its magnetic response rapidly at higher temperatures. The findings highlight the critical role of carefully optimized annealing parameters in maximizing sensor performance and offer practical guidance for the development of advanced magnetoelastic sensing systems.