Physical Review Letters · 1963 · 244 citations · 0 references
Natural SciencesChemistryPhysicsCondensed Matter PhysicsInorganic ChemistryPhysical ChemistryAntiferromagnetic MaterialsAntiferromagnetismExchange InteractionsMagnetic Properties Of SolidsMagnetism In SolidsMagnetism Of Inorganic CompoundsAntiferromagnetic CouplingAntiferromagnetic ExchangeAntiferromagnetic OrderingBiquadratic Exchange
Despite our assertion to the contrary, the integral of the last two terms in ( 22) is not zero except at 7" = 0.As a result ( 23) is correct only in this neighborhood and Fig. 1 is wrong.By transforming ( 22) into a sum over the poles of the Fermi function, one obtains