Solid state Pomeranchuk effect

TL;DR

This paper demonstrates that the solid state Pomeranchuk effect in certain compounds can be controlled by magnetic fields to produce cooling, analogous to effects observed in helium-3.

Contribution

It provides experimental evidence that the solid state Pomeranchuk effect can be harnessed for cooling applications in solid materials.

Findings

Solid state Pomeranchuk effect observed in $YbInCu_4$ and related compounds.

Magnetic field control enables cooling via the Pomeranchuk effect.

First demonstration of cooling using solid state Pomeranchuk effect.

Abstract

Recently we have shown that $YbInCu_4$ and related compounds present a solid state Pomeranchuk effect. These systems have a first order volume transition where a local moment phase coexists with a renormalized Fermi liquid in analogy with $^3He$ at its melting curve. We demonstrate here experimentally that the solid state Pomeranchuk effect, controlled by a magnetic field, can be used to produce cooling.