Pomeranchuk cooling

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Pomeranchuk cooling (named after Isaak Pomeranchuk) is the phenomenon in which liquid helium-3 will cool if it is compressed isentropically when it is below 0.3 K. This occurs because helium-3 has the unique property that solidification below 0.3 K requires pressure. This can be used to construct a cryogenic cooler.[1]


  1. ^ Weisstein, Eric. "Pomeranchuk Cooling". Eric Weisstein's World of Science.