Thermally induced spin-transfer torques in superconductor/ferromagnet bilayers

Thermally induced magnetization dynamics is currently a flourishing field of research due to its potential application in information technology. We study the paradigmatic system of a magnetic domain wall in a thermal gradient which is interacting with an adjacent superconductor. The spin-transfer torques arising in this system due to the combined action of the giant thermoelectric effect and the creation of equal-spin pairs in the superconductor are large enough to give rise to high domain wall velocities 103 times larger than previously predicted.

I. V. Bobkova, A. M. Bobkov, and Wolfgang Belzig, Thermally induced spin-transfer torques in superconductor/ferromagnet bilayers, Phys. Rev. B 103, L020503