Theory of spin-wave excitations of metallic A-type antiferromagnetic manganites

G. Jackeli, N. B. Perkins, N. M. Plakida

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Abstract

The spin dynamics of the metallic A-type antiferromagnetic manganites is studied. An effective nearest-neighbor Heisenberg spin-wave dispersion is derived from the double-exchange model taking into account the superexchange interaction between the core spins. The result of inelastic neutron-scattering experiment on (formula presented) is qualitatively reproduced. Comparing theory with experimental data, two main parameters of the model—nearest-neighbor electron-transfer amplitude and superexchange coupling between the core spins—are estimated.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number9
DOIs
StatePublished - 2001

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