Investigation of Converse Magnetoelectric Thin Film Sensors for Magnetocardiography

In principle, electrode-based bioelectrical signal acquisition can be complemented by biomagnetic sensing and therefore requires a more detailed assessment, especially because of the availability of novel noncryogenic sensor technologies. The current development of thin film magnetoelectric (ME) sen...

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Bibliographic Details
Published in:IEEE sensors journal 2023-03, Vol.23 (6), p.1-1
Main Authors: Elzenheimer, Eric, Hayes, Patrick, Thormahlen, Lars, Engelhardt, Erik, Zaman, Adrian, Quandt, Eckhard, Frey, Norbert, Hoft, Michael, Schmidt, Gerhard
Format: Article
Language:English
Subjects:
Bioelectricity
Biomagnetometry
Cardiovascular applications
Evaluation
Low noise
Magnetic measurement
Magnetic noise
Magnetic resonance
Magnetic sensors
Magnetic shielding
Magnetocardiography
Magnetocardiography (MCG)
Magnetoelectric effects
Magnetoelectric sensors
Magnetostriction
ME performance
ME sensors
Optically pumped magnetometers
Pilot study
Sensors
Thin films
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Summary:In principle, electrode-based bioelectrical signal acquisition can be complemented by biomagnetic sensing and therefore requires a more detailed assessment, especially because of the availability of novel noncryogenic sensor technologies. The current development of thin film magnetoelectric (ME) sensors ensures that the ME technology is becoming a prospective candidate for biomagnetometry. The main obstacle for large-scale usage is the lack of extremely low noise floors at the final sensor system output. This article highlights the current state of ME sensor development based on a magnetocardiography pilot study involving a healthy volunteer in a magnetically shielded chamber. For assessment, an ME prototype ( converse magnetoelectric thin film sensor ) will be applied for the first time. This sensor type ensures a noise amplitude spectral density below 20 pT/√ Hz at 10 Hz by using a sophisticated magnetic layer system. The main aim of this pilot study is to evaluate the applicability of this promising sensor for the detection of a human heart signal and to evaluate the sensor output with competitive optical magnetometry technology. A magnetic equivalent of a human R wave could be successfully detected within a one-minute measurement period with the sensor presented here. Finally, the article will provide an outlook on future ME perspectives and challenges, especially for cardiovascular applications.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2023.3237910