Ultra-efficient Cooling in Ferromagnet-Superconductor Microrefrigerators
F. Giazotto, F. Taddei, R. Fazio, F. Beltram
Abstract
A promising scheme for electron microrefrigeration based on ferromagnet-superconductor contacts is presented. In this setup, cooling power densities up to 600 nW/μm2 can be achieved leading to electronic temperature reductions largely exceeding those obtained with existing superconductor-normal metal tunnel contacts. Half-metallic CrO2/Al bilayers are indicated as ideal candidates for the implementation of the device.
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