Tetragonal BaCoO$_3$: A Co$^{4+}$ Ferromagnetic Mott Insulator with
Inverted Spin Crossover
Tetragonal BaCoO$_3$: A Co$^{4+}$ Ferromagnetic Mott Insulator with
Inverted Spin Crossover
The interplay between crystal electric field splitting of d states and Hund's rule exchange energy in cobalt-based perovskites offers a promising avenue for inducing spin-state transitions. This study reports a new body-centered tetragonal (BCT) phase of BaCoO$_3$ (BCT-BaCoO$_3$), synthesized under high pressure (15 GPa) and high temperature (1200 {\deg}C) conditions. …