Abstract
The magnetic excitations of an infinite-layer antiferromagnetic insulator SrFeO2 were examined by powder inelastic neutron scattering to find dispersive magnetic excitations from ∼15 up to 63 meV. The scattering intensity distribution is well described by a spin wave model, confirming that the out-of-plane direct FeFe exchange is comparable in strength to the in-plane Fe-O-Fe superexchange. SrFeO2 shows an additional magnetic excitation mode around 30 meV, which is suggestive of an orbital magnon arising from small orbital moment on Fe2+ brought about by spin-orbit coupling.
Original language | English |
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Article number | 034707 |
Journal | journal of the physical society of japan |
Volume | 79 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2010 Mar |
Keywords
- Mott insulator
- Orbital angular momentum
- Orbital wave
- Spin wave
ASJC Scopus subject areas
- Physics and Astronomy(all)