Perovskite-like fluorides and oxyfluorides: Phase transitions and caloric effects.

n analysis of the effect that chemical and hydrostatic pressures have on the thermodynamic properties of perovskite-like fluorine-oxygen compounds A A′ MeOF has revealed that materials under-going order-disorder transitions and having significant external-pressure compliance have the highest caloric efficiency. Some of the fluorides and oxyfluorides under study can be considered promising solid coolants. [ABSTRACT FROM AUTHOR]