[9p-PB1-1~80] 10 Spintronics and Magnetics (Poster)

▼ [9p-PB1-67] Radio-frequency magnetic field sensitivity of magnetic vortex in magnetic tunnel junctions

〇Ryota Okuno¹, Minori Goto^1,2, Sumito Tsunegi³, Kei Yakushiji³, Hitoshi Kubota³, Akio Fukushima³, Shinji Yuasa³, Hikaru Nomura^1,2, Yoshishige Suzuki^1,2,3 (1.Osaka Univ., 2.CSRN-Osaka, 3.AIST)

Keywords:spintronics

It is important to develop magnetic field sensors with high sensitivity in medical applications. Recently, magnetic tunnel junction (MTJ) sensor with uniform magnetization layer is studied well [1]. Further, low frequency magnetic field sensitivity of magnetic vortex in MTJ (vortex MTJ) is studied [2], however, radio-frequency (RF) magnetic field sensitivity of vortex MTJ is not yet studied. The magnetization fluctuation mode of magnetic vortex is different from the mode of uniform magnetization, and it is expected that the magnetic field sensitivity of these two magnetization structures is different. Magnetic vortex has a thermal fluctuation noise around RF range, and to research this noise characteristic is essential. Therefore, in this study, we demonstrate the RF magnetic field sensitivity of vortex MTJ.