COOLING DEVICE Russian patent published in 2016 - IPC F25B21/02 H01L35/00 

FIELD: physics.

SUBSTANCE: invention relates to solid-state cryogenics, specifically to cooling devices based on the Peltier effect using a magnetic field (longitudinal thermomagnetic-galvanic effect), and can be used in cooling small objects. A cooling device, having a thermocouple with an n-branch 10 made of a Bi-Sb alloy and a passive p-branch 9 made of metal, placed in a magnetic field, the n-branch having a monotonously increasing, throughout its length from the hot junction to the cold junction, antimony concentration in the alloy which is calculated using the formula ∇C=∇T·(E_g/T_h·δ), where ∇C is the concentration gradient of antimony in the alloy, at%·cm^-1, E_g is the average width of the gap between the valance band and the conductivity band of the n-branch, meV, T_h is the temperature of the hot junction of the thermocouple, K, ∇T is the temperature gradient on the n-branch, K/cm, δ is the rate of increase of the width of the gap between the valance band and the conductivity band in the alloy with the increase in antimony content, meV/at%.

EFFECT: high thermoelectric efficiency is achieved via the compensation of the longitudinal change of the electric field strength of transverse galvanic and thermomagnetic effects caused by the temperature drop on the length of the branch and change in the antimony concentration in the alloy along the branch.

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