In the Ising-like triangular antiferromagnet Er7TaO12, long-range magnetic order forms on cooling then melts into short-range correlations at lower temperature, realizing a spin analog of the Pomeranchuk effect.
ˇSibav,et al., Optimized Flux Single-Crystal Growth of the Quantum Spin Liquid Candidate NdTa7O19 and Other Rare-Earth Heptatantalates, ErTa7O19 and GdTa7O19.Crys
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Melting upon cooling in a quantum magnet
In the Ising-like triangular antiferromagnet Er7TaO12, long-range magnetic order forms on cooling then melts into short-range correlations at lower temperature, realizing a spin analog of the Pomeranchuk effect.