Spin-wave dispersion in orbitally ordered La(0.5)Sr(1.5)MnO(4)

Abstract

The magnon dispersion in the charge, orbital and spin ordered phase in La(0.5)Sr(1.5)MnO(4) has been studied by means of inelastic neutron scattering. We find an excellent agreement with a magnetic interaction model basing on the CE-type superstructure. The magnetic excitations are dominated by ferromagnetic exchange parameters revealing a nearly-one dimensional character at high energies. The nearest neighbor ferromagnetic interaction in La(0.5)Sr(1.5)MnO(4) is significantly larger than the one in the metallic ferromagnetically ordered manganites. The large ferromagnetic interaction in the charge/orbital ordered phase appears to be essential for the capability of manganites to switch between metallic and insulating phases.

arXiv comment4 pages, 3 figures

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Cited by in corpus (19)

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• Neutron scattering studies on stripe phases in non-cuprate materials
• Magnetic order and dynamics of the charge-ordered antiferromagnet La1.5Sr0.5CoO4
• Orbital order in La0.5Sr1.5MnO4: beyond a common local Jahn-Teller picture
• Spin-wave excitations in the ferromagnetic-metallic and in the charge, orbital and spin ordered states in Nd${}_{1-x}$Sr${}_x$MnO${}_3$ with x$\approx$0.5
• Magnetic structure and magnon dispersion in LaSrFeO${}_4$
• Melting of magnetic correlations in charge-orbital ordered La(0.5)Sr(1.5)MnO(4) : competition of ferro and antiferromagnetic states
• Ground state in a half-doped manganite distinguished by neutron spectroscopy
• Evidence for charge orbital and spin stripe order in an overdoped manganite
• Effect of antiferromagnetic spin correlations on lattice distortion and charge ordering in Pr${}_{0.5}$Ca${}_{1.5}$MnO${}_4$
• Bridging charge-orbital ordering and Fermi surface instabilities in half-doped single-layered manganite La_0.5Sr_1.5MnO_4
• Charge and orbital order in transition metal oxides
• Hourglass dispersion in overdoped single-layered manganites
• Electronic self-organization in the single-layer manganite $\mathrm{P}{\mathrm{r}}_{1-x}\mathrm{C}{\mathrm{a}}_{1+x}\mathrm{Mn}{\mathrm{O}}_4$
• Orbital fluctuations, spin-orbital coupling, and anomalous magnon softening in an orbitally degenerate ferromagnet
• Spin excitations used to probe the nature of the exchange coupling in the magnetically ordered ground state of Pr${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• Magnon dressing by orbital excitations in ferromagnetic planes of K${}_2$CuF${}_4$ and LaMnO${}_3$
• Spin Excitations in Half-Doped Manganites
• Quantum magnons of the intermediate phase of half-doped manganite oxides