[10p-PB3-1~43] 10 Spintronics and Magnetics (Poster)

[10p-PB3-38] Damping constant for CoMnFe/Cr Multilayers with perpendicular magnetic anisotropy

〇Sousuke Takaoka^1,2, Koki Nukui^1,2, Deepak Kumar², Soma Miki², Shigemi Mizukami^2,3 (1.Dept. Appl. Phys., Tohoku Univ., 2.WPI-AIMR, Tohoku Univ., 3.CSIS, Tohoku Univ.)

Keywords:

Spintronics,MRAM,Magnetization dynamics

Higher integration density and lower write current in STT-MRAM require the simultaneous achievement of high perpendicular magnetic anisotropy and low damping. In this study, the magnetization dynamics of bcc Co-Mn-Fe/Cr multilayers were evaluated using TR-MOKE measurements. The effective damping constant decreased with increasing magnetic field and reached approximately 0.013 at high fields. These results confirm that bcc Co-Mn-Fe can exhibit both high PMA and relatively low damping.