Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-01-11
Physics
Condensed Matter
Strongly Correlated Electrons
14 pages, 11 figures
Scientific paper
10.1103/PhysRevB.77.184413
The magnetic correlations in the charge- and orbital-ordered manganite La(0.5)Sr(1.5)MnO(4) have been studied by elastic and inelastic neutron scattering techniques. Out of the well-defined CE-type magnetic structure with the corresponding magnons a competition between CE-type and ferromagnetic fluctuations develops. Whereas ferromagnetic correlations are fully suppressed by the static CE-type order at low temperature, elastic and inelastic CE-type correlations disappear with the melting of the charge-orbital order at high temperature. In its charge-orbital disordered phase, La(0.5)Sr(1.5)MnO(4) exhibits a dispersion of ferromagnetic correlations which remarkably resembles the magnon dispersion in ferromagnetically ordered metallic perovskite manganites.
Benomar M.
Braden Markus
Habicht Klaus
Kriener M.
Link Peter
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