The study maps the orientation-dependent high-field phase diagram of SrFeO3, introduces an effective spin Hamiltonian with anisotropy and momentum-space interactions, and reports magnetoelastic evidence for a first-order valence transition at 40 T linked to suppressed negative charge transfer.
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Revisiting the high-field phase diagram of the topological cubic helimagnet SrFeO$_{3}$
The study maps the orientation-dependent high-field phase diagram of SrFeO3, introduces an effective spin Hamiltonian with anisotropy and momentum-space interactions, and reports magnetoelastic evidence for a first-order valence transition at 40 T linked to suppressed negative charge transfer.