[23p-1BJ-1~12] 10.3 Spin devices, magnetic memories and storages

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)

[23p-1BJ-5] Theoretical study on 1/f noise of TMR sensors

〇Hiroshi Imamura¹, Hiroko Arai¹, Rie Matsumoto¹, Toshiki Yamaji¹ (1.AIST)

Keywords:

magnetic field sensor,Tunnel magnetoresistance (TMR),1/f noise

Tunnel magnetoresistance (TMR) sensor is a highly sensitive magnetic field sensor and is expected to be applied in bio-medical sensing. Although 1/f noise is a dominant noise in bio-medical sensing, theoretical understanding of the 1/f noise in the TMR sensor is not sufficient to improve the detection capability. Here, we propose a theoretical model of 1/f noise of TMR sensors and explain the recent experimental results. We also predict the bias magnetic fields at which the TMR sensor exhibits high detection capability. The results provide a new perspective on 1/f noise and will be useful for improvement of TMR sensors.