Na atomic order, Co charge disproportionation and magnetism in Na${}_x$CoO${}_2$ for large Na contents

H. Alloul, I. R. Mukhamedshin, G. Collin +1

We have synthesized and characterized four different stable phases of Na ordered Na${}_x$CoO${}_2$, for $0.65<x<0.8$. Above 100 K they display similar Curie-Weiss susceptibilities…