Nanoscale magnetic heat pumps and engines

Gerrit E.W. Bauer, Stefan Bretzel, Arne Brataas, Yaroslav Tserkovnyak

Research output: Contribution to journalArticlepeer-review

74 Citations (Scopus)


We present the linear-response matrix for a sliding domain wall in a rotatable magnetic nanowire, which is driven out of equilibrium by temperature and voltage bias, mechanical torque, and magnetic field. An expression for heat-current-induced domain-wall motion is derived. Application of Onsager's reciprocity relation leads to a unified description of the Barnett and Einstein-de Haas effects as well as spin-dependent thermoelectric properties. We envisage various heat pumps and engines, such as coolers driven by magnetic fields or mechanical rotation as well as nanoscale motors that convert temperature gradients into useful work. All parameters (with the exception of mechanical friction) can be computed microscopically by the scattering theory of transport.

Original languageEnglish
Article number024427
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
Publication statusPublished - 2010 Jan 28


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