Evolution of MEG: A first MEG-feasible fluxgate magnetometer

HUMAN BRAIN MAPPING(2021)

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Abstract
In the current article, we present the first solid-state sensor feasible for magnetoencephalography (MEG) that works at room temperature. The sensor is a fluxgate magnetometer based on yttrium-iron garnet films (YIGM). In this feasibility study, we prove the concept of usage of the YIGM in terms of MEG by registering a simple brain induced field-the human alpha rhythm. All the experiments and results are validated with usage of another kind of high-sensitive magnetometers-optically pumped magnetometer, which currently appears to be well-established in terms of MEG.
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Key words
alpha rhythm,fluxgate magnetometers,magnetoencephalography,optically pumped magnetometers,yttrium-iron garnet magnetometers
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