Investigation of Converse Magnetoelectric Thin-Film Sensors for Magnetocardiography

Elzenheimer, Eric; Hayes, P. R.; Thormählen, Lars; Engelhardt, Erik; Zaman, Adrian; Quandt, Eckhard; Frey, Norbert; Höft, Michael; Schmidt, Gerhard

doi:10.1109/jsen.2023.3237910

Cited by 23 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, the possible use of ME magnetic field sensors for detecting magnetic signals from the heart and brain has been actively investigated [77][78][79]. These signals are magnetic fields of low amplitude and low frequency [80,81].…”

Section: Discussionmentioning

confidence: 99%

Modeling the Magnetoelectric Composites in a Wide Frequency Range

Bichurin,

Sokolov,

Ivanov

et al. 2023

Materials

View full text Add to dashboard Cite

This article presents a general theory of the ME effect in composites in the low- and high-frequency ranges. Besides the quasi-static region, the area of electromechanical resonance, including longitudinal, bending, longitudinal shear, and torsional modes, is considered in more detail. To demonstrate the theory, expressions of ME voltage coefficients are obtained for symmetric and asymmetric layered structures. A comparison is made with the experimental results for the GaAs/Metglas and LiNbO3/Metglas structures. The main microwave ME effect, consisting of the FMR line shift in an electric field, for the ferromagnetic metals, their alloys, and YIG ferrite using various piezoelectrics is discussed. In addition to analytical calculations, in the article, finite element modeling is considered. The calculation methods and experimental results are compared for some composites.

show abstract

Section: Discussionmentioning

confidence: 99%

Modeling the Magnetoelectric Composites in a Wide Frequency Range

Bichurin,

Sokolov,

Ivanov

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…The sensors are placed equally across a 250 mm × 250 mm × 100 mm region centered 200 mm above the heart. Since we simulate one layer of voxels, the measurements have to be scaled up to match reasonable field amplitudes as reported in [29][30][31]. We scale the measurements by a fixed factor of 70 to achieve a maximum R-peak amplitude of 100 pT for the ground truth model.…”

Section: Setupmentioning

confidence: 99%

Non-Invasive Electroanatomical Mapping: A State-Space Approach for Myocardial Current Density Estimation

Engelhardt,

Elzenheimer,

Hoffmann

et al. 2023

Bioengineering

Self Cite

View full text Add to dashboard Cite

Electroanatomical mapping is a method for creating a model of the electrophysiology of the human heart. Medical professionals routinely locate and ablate the site of origin of cardiac arrhythmias with invasive catheterization. Non-invasive localization takes the form of electrocardiographic (ECG) or magnetocardiographic (MCG) imaging, where the goal is to reconstruct the electrical activity of the human heart. Non-invasive alternatives to catheter electroanatomical mapping would reduce patients’ risks and open new venues for treatment planning and prevention. This work introduces a new system state-based method for estimating the electrical activity of the human heart from MCG measurements. Our model enables arbitrary propagation paths and velocities. A Kalman filter optimally estimates the current densities under the given measurements and model parameters. In an outer optimization loop, these model parameters are then optimized via gradient descent. This paper aims to establish the foundation for future research by providing a detailed mathematical explanation of the algorithm. We demonstrate the feasibility of our method through a simplified one-layer simulation. Our results show that the algorithm can learn the propagation paths from the magnetic measurements. A threshold-based segmentation into healthy and pathological tissue yields a DICE score of 0.84, a recall of 0.77, and a precision of 0.93.

show abstract

“…In particular, the detection of low-intensity and low-frequency magnetic fields has numerous applications in electrical network monitoring and biomedical fields. i.e., these characteristics categorize these sensors as specifically designed for monitoring and diagnosing biomagnetic signals, particularly in applications such as magnetocardiography (MCG) and magnetoencephalography (MEG) [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Designing Multifunctional Multiferroic Composites for Advanced Electronic Applications

Pereira,

Pastoril,

Dias

et al. 2024

Electronics

View full text Add to dashboard Cite

This paper presents a novel approach for the fabrication of magnetoelectric composites aimed at enhancing cross-coupling between electrical and magnetic phases for potential applications in intelligent sensors and electronic components. Unlike previous methodologies known for their complexity and expense, our method offers a simple and cost-effective assembly process conducted at room temperature, preserving the original properties of the components and avoiding undesired phases. The composites, composed of PZT fibers, cobalt (CoFe2O4), and a polymeric resin, demonstrate the uniform distribution of PZT-5A fibers within the cobalt matrix, as demonstrated by scanning electron microscopy. Detailed morphological analyses reveal the interface characteristics crucial for determining overall performance. Dielectric measurements indicate stable behaviors, particularly when PZT-5A fibers are properly poled, showcasing potential applications in sensors or medical devices. Furthermore, H-dependence studies illustrate strong magnetoelectric interactions, suggesting promising avenues for enhancing coupling efficiency. Overall, this study lays the basic work for future optimization of composite composition and exploration of its long-term stability, offering valuable insights into the potential applications of magnetoelectric composites in various technological domains.

show abstract

Investigation of Converse Magnetoelectric Thin-Film Sensors for Magnetocardiography

Cited by 23 publications

References 29 publications

Modeling the Magnetoelectric Composites in a Wide Frequency Range

Modeling the Magnetoelectric Composites in a Wide Frequency Range

Non-Invasive Electroanatomical Mapping: A State-Space Approach for Myocardial Current Density Estimation

Designing Multifunctional Multiferroic Composites for Advanced Electronic Applications

Contact Info

Product

Resources

About