About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Magnetic Materials for Energy and Power Conversion Applications
|
Presentation Title |
High-performance Amorphous Wire Magneto-impedance Sensor for Biomagnetic Field Detection |
Author(s) |
Tsuyoshi Uchiyama, Jiaju Ma |
On-Site Speaker (Planned) |
Tsuyoshi Uchiyama |
Abstract Scope |
We have constituted highly sensitive linear micro magnetic field sensors utilizing Off-diagonal Magneto-Impedance (MI) effect. Recently we have succeeded in producing pico-Tesla (10-8Oe) resolution MI sensors due to ultra-low intrinsic magnetic noise of amorphous wire. Superconducting quantum interference deice (SQUID) have ultrasensitive, which have been utilized for bio-magnetic signals. For example, magnetocardiography (MCG) is a noninvasive technology that measures the magnetic field of the heart. The SQUIDs have been also used to measure human brain.We have successfully measure MCG signal using a precise MI gradiometer. The gradiometer tested as magnetoencephalogram detectors as well. The spontaneous brain activity (Alpha rhythm) measurements were carried out on several subjects. As expected, the alpha rhythm signals simultaneously measured by EEG and MI gradiometer were significantly attenuated when the subject opens eyes and then intensified with eyes close. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |