Ultra-efficient Cooling in Ferromagnet-Superconductor Microrefrigerators

Abstract

A promising scheme for electron microrefrigeration based on ferromagnet-superconductor contacts is presented. In this setup, cooling power densities up to 600 nW/$\mu$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

Cited by in corpus (22)

• Opportunities for mesoscopics in thermometry and refrigeration: Physics and applications
• Huge thermoelectric effects in ferromagnet-superconductor junctions in the presence of a spin-splitting field
• Thermal rectification of electrons in hybrid normal metal-superconductor nanojunctions
• A normal metal tunnel-junction heat diode
• Efficient electron refrigeration using superconductor/spin-filter devices
• Efficient and tunable Aharonov-Bohm quantum heat engine
• A Microwave Josephson Refrigerator
• Electron cooling by diffusive normal metal - superconductor tunnel junctions
• Coherent diffraction of thermal currents in Josephson tunnel junctions
• Electron cooling in diffusive normal metal - superconductor tunnel junctions with a spin-valve ferromagnetic interlayer
• Capacitively coupled hot-electron nanobolometer as far-infrared photon counter
• Phase-dependent heat transport through magnetic Josephson tunnel junctions
• Landau Cooling in Metal-Semiconductor Nanostructures
• Non-galvanic primary thermometry of a two-dimensional electron gas
• Local characterization of ferromagnetic properties in ferromagnet/superconductor bilayer by Point Contact Andreev Reflection Spectroscopy
• Cooling electrons by magnetic-field tuning of Andreev reflection
• Ultra-low dissipation Josephson transistor
• Influence of photon-assisted tunneling on heat flow in a normal metal - superconductor tunnel junction
• Heat transport and electron cooling in ballistic normal-metal/spin-filter/superconductor junctions
• High-performance Andreev interferometer-based electronic coolers
• Quasiparticle cooling using a Topological insulator-Superconductor hybrid junction
• Cooling of electrons via superconducting tunnel junctions and their arrays exhibiting nodal lines