A different look at the spin state of Co${}^{3+}$ ions in CoO${}_5$ pyramidal coordination

Z. Hu, Hua Wu, M. W. Haverkort +10

Using soft-x-ray absorption spectroscopy at the Co-$L_{2,3}$ and O-$K$ edges, we demonstrate that the Co${}^{3+}$ ions with the CoO${}_5$ pyramidal coordination in the layered Sr${}_2$…