Abstract

A comparison of magnetic and structural data of homologous series of 2D ACrO 2 compounds such as alkali chromites (A = Li, Na, K) and delafossite oxides (A = Cu, Ag) shows that, for A=Li and Na, the magnitude of interlayer magnetic interactions (J') leads to an overestimate of the intralayer exchange integral J using the series expansion coefficients computed by Rushbrooke and Wood for an ideal plane triangular lattice. This result is confirmed by a comparison of the theoritical values of the antiferromagnetic component of J and of the J'/J ratios.

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