Ultra-efficient Cooling in Ferromagnet-Superconductor Microrefrigerators
arXiv:cond-mat/0203355 · doi:10.1063/1.1481242
Abstract
A promising scheme for electron microrefrigeration based on ferromagnet-superconductor contacts is presented. In this setup, cooling power densities up to 600 nW/$μ$m$^2$ can be achieved leading to electronic temperature reductions largely exceeding those obtained with existing superconductor-normal metal tunnel contacts. Half-metallic CrO$_2$/Al bilayers are indicated as ideal candidates for the implementation of the device.
9 pages, 3 figures, submitted to Applied Physics Letters