Sign Reversal of Spin‐Transfer Torques (Adv. Sci. 29/2024)

Spin-Transfer Torques The key result of article number 2309467 by Sonny H. Rhim, Sug-Bong Choe, and co-workers is that the sign of spin-transfer torque can be engineered to be either positive or negative, depending on the spin polarization of the conduction electrons passing through the magnets. The cover image illustrates the positive (negative) spin-transfer torque, which drives the magnetic domain wall in the direction of the electric current (electron flow) for negative (positive) spin polarization.