[16p-PA09-1~18] 6.4 Thin films and New materials

[16p-PA09-12] How to apply high frequency magnetic bias to the triple-layered magnetic thin film for an ultra-high-sensitivity magnetic sensor

〇Yoshikatsu Kanno¹, Yosuke Tsuchida¹, Takeshi Shinkai¹, Makoto Tsuruoka¹ (1.Tokyo Univ. of Technology)

Keywords:magnetic Field, high frequency device, magnetic thin films

This study aims to develop a multilayer magnetic thin film (Ni₈₀Fe₂₀) that can detect biomagnetic signals from the brain and heart, which contain many high frequency components, with a small and inexpensive device, instead of relying on a large and expensive device such as a SQUID. In order to confirm the high frequency response of this magnetic sensor, a magnetization response measurement system capable of high frequency measurement is indispensable. Since the magnetic bias applied in this apparatus is currently limited to a few [MHz] , we have pursued a method of applying a high frequency bias that is close to that of biomagnetism.