Accurate prediction of multicaloric response and thermodynamics in FeRh.
Stoichiometric B2 FeRh exhibits several phase transformations, including a martensitic one at a cryogenic temperature [Phys. Rev. B 97, 014202 (2018)] and a metamagnetic transition at 353 K from antiferromagnet (AFM) with (111) spin ordering to a ferromagnet (FM), yielding multicaloric, i.e., magneto-, elasto-, and baro-caloric, responses. With its chemical simplicity, FeRh serves as a wonderful fruit fly in the materials genome discovery of caloric systems. Applying estimators for thermodynamic quantities, we predict the metamagnetic transition at 346 K and calculate the associated caloric properties, including isothermal entropy and isentropic temperature changes, in a quantitative agreement with experiment.
Publisher URL: http://arxiv.org/abs/1702.03042