Fig. 3: Modification of resonance field.
From: Signatures of magnetism control by flow of angular momentum
a, I dependence of HR measured at selected frequencies for H along [110] for tFe = 2.8 nm. b, The same as a but for H along \([\bar{1}10]\). c,d, The same plots as a and b but for tFe = 1.2 nm. Error bars represent the standard error of the least squares fit of the VKerr(H) traces. The red and blue arrows in each panel are marked to show the relative amplitude of HR(−I) and HR(+I). As shown in the top panels, for all the devices, the charge currents are applied along the [100] orientation, and the direction of the spin accumulation σ is along the [010] direction with equal projections onto the [110] and \([\bar{1}10]\) orientations. This experimental trick allows an accurate comparison of the current-induced modification for the [110] and \([\bar{1}10]\) orientations in the same device.
