Skip to main content
. 2019 Dec 13;5(12):eaay5141. doi: 10.1126/sciadv.aay5141

Fig. 2. Tuning the magnetic anisotropy of the free layer by voltage using two pairs of electrodes.

Fig. 2

(A) Schematic top view of the sample structure with two pairs of AA and BB electrodes. An elliptical MTJ device of 18 × 6 μm2 was placed at the center of two electrode pairs. The major axis of the elliptical device was along the x axis. The pinning direction of the MTJ was along the [100] direction of the PMN-PT substrate (+x axis). The joint line of the AA electrodes was perpendicular to the pinning direction, while that of the BB electrodes deviated from the pinning direction by 45°. (B to E) Polar curves of the angular-dependent MR/MS of a CoFeB layer, when the applied voltages were 0 V (B), BB 200 V (C), AA 400 V (D), and BB −200 V (E). The [100] direction of the PMN-PT substrate was defined as 0°. The double-headed arrows indicate the direction of the magnetic easy axis.