First-principles analysis of magnetic superexchange in cubic fluoro- and oxo-perovskites.
We present a comprehensive first-principles analysis of magnetic ordering via superexchange in KMnF3, CaMnO3, and SrMnO3, which constitutes an extension of our previous study on fluorides KNiF3 and KVF3. Using the metallic non-magnetic (NM) phase as a reference, we examine the transition to the insulating antiferromagn...