講演情報
[14p-K302-14]High-sensitivity and hysteresis-free tunnel magnetoresistance sensor with magnetic vortex structure
〇(M2)Seiya Takano1, Takafumi Nakano1, Mikihiko Oogane1,2 (1.Graduate School of Engineering, Tohoku Univ., 2.CSIS, Tohoku Univ.)
キーワード:
TMR sensor、magnetic vortex structure
Tunnel magnetoresistance (TMR) sensors utilizing magnetic tunnel junctions (MTJs) are high- sensitivity magnetic sensors capable of operating at room temperature. In high-sensitivity magnetic sensors like TMR sensors, minimizing hysteresis error is critical to avoid measurement inaccuracies. However, when the free layer film has a multidomain structure, completely eliminating magnetic hysteresis is difficult. In order to resolve this problem, this study aims to develop hysteresis-free and high-sensitivity MTJ by employing magnetic vortex structure with hysteresis-free and microfabricated pillar-shaped pinned layer.