Document Type
Article
Publication Date
4-30-2013
Journal or Book Title
Physical Review Letters
Volume
87
Issue
14
First Page
140509(R)
DOI
10.1103/PhysRevB.87.140509
Abstract
Inelastic neutron scattering measurements demonstrate that the magnetic interactions in antiferromagnetic LaFeAsO are two dimensional. Spin-wave velocities within the Fe layer and the magnitude of the spin gap are similar to the AFe2As2 based materials. However, the ratio of interlayer and intralayer exchange is found to be less than ∼10−4 in LaFeAsO, very similar to the cuprates, and ∼100 times smaller than that found in AFe2As2 compounds. The results suggest that the effective dimensionality of the magnetic system is highly variable in the parent compounds of the iron arsenides and weak three-dimensional interactions may limit the maximum attainable superconducting Tc.
Copyright Owner
American Physical Society
Copyright Date
2013
Language
en
File Format
application/pdf
Recommended Citation
Ramazanoglu, Mehmet; Lamsal, J.; Tucker, Gregory S.; Yan, J.-Q.; Calder, S.; Guidi, T.; Perring, T.; McCallum, R. William; Lograsso, Thomas A.; Kreyssig, Andreas; and McQueeney, Robert J., "Two-dimensional magnetic interactions in LaFeAsO" (2013). Ames Laboratory Publications. 43.
https://lib.dr.iastate.edu/ameslab_pubs/43
Comments
This article is from Physical Review B 87 (2013): 140509(R), doi:10.1103/PhysRevB.87.140509.