Fig. 3 Gate voltage dependence of the areal iDMI and PMA. Gate voltage dependence of the areal iDMI and PMA. VG dependence of the areal iDMI magnitude Dt for the sample with tCo = (A) 0.78 nm and (B) 0.98 nm is shown. Dt is determined using the vs and areal magnetic moment of the sample following Eq. 1. a.u., arbitrary units. The error bar indicates the error of vs. Areal PMA energy Kut as a function of VG for the tCo = (C) 0.78 nm and (D) 0.98 nm samples is shown. Tomohiro Koyama et al. Sci Adv 2018;4:eaav0265 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).