[18a-D104-4~11] 10.3 Spin devices, magnetic memories and storages

△ [18a-D104-11] Room Temperature Magnetoencephalography and Magnetocardiography Measurements using TMR Sensors

〇Kousuke Fujiwara¹, Mikihiko Oogane¹, Akitake Kanno³, Masahiro Imada², Junichi Jono², Takashi Terauchi², Tetsuo Okuno², Yuuji Aritomi², Kiyofumi Hashimoto², Masahiro Morikawa², Masaaki Tsuchida², Nobukazu Nakasato³, Yasuo Ando¹ (1.Tohoku Univ. Eng., 2.Konicaminolta, 3.Tohoku Univ. Med.)

Keywords:bio magnetic field, magnetic field sensor, magnetic tunnel junction

We developed tunnel magneto-resistance (TMR) sensors to measure bio-magnetic fields from heart and brain of human. In the magnetocardiography that measures the magnetic field of the heart, the R peak was measured in real time, and the QRS complex was also measured by averaging for about 1 minute. In the magnetoencephalography which is a method of measuring the magnetic field from the brain, we successfully measured the signal of alpha wave by 10,000 times averaging.