Origin of ferromagnetism in Cs${}_2$AgF${}_4$: importance of Ag - F covalency

Deepa Kasinathan, A. B. Kyker, D. J. Singh

The magnetic nature of Cs${}_2$AgF${}_4$, an isoelectronic and isostructural analogue of La${}_2$CuO${}_4$, is analyzed using density functional calculations. The ground state is found…