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It is known that magnetic sensors have had a large contribution to numerous domains such as geomagnetic detection, metal foreign matter detection, and bio-magnetic signal sensing both in the past and the future. However, a large amount of them are still working with the conventional analog components that are not suitable for the contemporary sensor network.
We have achieved pico-Tesla (10−8 Oe) resolution for micro magneto-impedance (MI) sensors by utilizing the ultra-low intrinsic noise of amorphous wire the pulse magneto-impedance effect. We previously reported a study on bio-magnetic measurement using a pico-Tesla resolution MI sensor without any magnetic shielding. In order to detect very weak magnetic fields such as bio-magnetic fields, we constructed...
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