Interplay of Intersite Charge Transfer, Antiferromagnetism, and Strain in Barocaloric ACu${}_3$Fe${}_4$O${}_{12}$ Quadruple Perovskites

J. Delgado-Quesada, G. G. Guzmán-Verri, G. G. Guzmán-Verri

We develop a minimal Landau theory for the concomitant intersite charge-transfer, antiferromagnetic, and isostructural phase transitions in ACu${}_3$Fe${}_4$O${}_{12}$ perovskites (A = L…