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Updated: Jun 27, 2025
09:49
In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
Published on: May 13, 2020
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Asymmetric magnetoimpedance in exchange-biased systems
J P Gazola1, M S Santos1, A M H de Andrade2
1Departamento de Física, Universidade federal de Santa Maria, Santa Maria, RS 97105-900, Brazil.
Summary
This study investigates asymmetry in magnetoimpedance curves for exchange-biased bilayers. Researchers identified the sources of this asymmetry by comparing experimental data with a phenomenological model.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Competing anisotropies in magnetic systems often lead to asymmetry in magnetoimpedance curves.
- Experimental setup errors can also introduce asymmetry in magnetoimpedance measurements.
Purpose of the Study:
- To investigate the sources of asymmetry in magnetoimpedance (MI) peaks within exchange-biased systems.
- To compare experimental data with a phenomenological model to understand MI asymmetry.
Main Methods:
- Fabrication of NiFe/FeMn exchange-biased bilayer samples with varying repetitions.
- Experimental measurement of magnetoimpedance curves at different frequencies.
- Analysis of magnetization curves.
- Comparison of experimental data with a phenomenological model.
Main Results:
- The study successfully identified the origins of magnetoimpedance asymmetry in the experimental data.
- The frequency evolution of asymmetry provided key insights into its sources.
- Comparison with a phenomenological model aided in pinpointing the asymmetry contributors.
Conclusions:
- The research clarifies the factors contributing to magnetoimpedance asymmetry in exchange-biased bilayers.
- Understanding these asymmetries is crucial for accurate magnetic sensor design and characterization.
- The combined approach of modeling and experimental analysis proves effective in dissecting complex magnetic phenomena.
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