[11a-E208-1~11] 10.3 Spin devices, magnetic memories and storages

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[11a-E208-6] Comprehensive Study of Magnetic Tunnel Junctions for Field-Free Energy Harvester with Wireless Signal

〇(M2)Harumi Chiku^1,2, Kazunari Kino^1,2, Takaaki Dohi¹, Shun Kanai^1,2,3,4,5,6, Shunsuke Fukami^1,2,3,4,7,8 (1.RIEC, Tohoku Univ., 2.Electronic Engineering, Tohoku Univ., 3.WPI-AIMR, Tohoku Univ., 4.CSIS, Tohoku Univ., 5.National Institutes for QST, 6.DEFS, Tohoku Univ., 7.CIES, Tohoku Univ., 8.Inamori Research Institute for Science)

Keywords:

spintronics,MTJ

Energy harvesting from ambient wireless signals is a promising approach toward realizing a low-carbon society and battery-free IoT devices. Ferromagnetic resonance (FMR) in magnetic tunnel junctions (MTJs) has recently attracted attention as a key mechanism for this purpose, with successful demonstrations at 2.4 GHz for Wi-Fi applications. In the MTJ-based method, tuning the resonance frequency to the target wireless communication band at zero external magnetic field is important for practical applications. In this work, we comprehensively investigate the dependence of FMR characteristics on MTJ structures to establish guidelines for field-free energy harvesters.