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Persistent URL	http://purl.org/net/epubs/work/65398
Record Status	Checked
Record Id	65398
Title	Two-dimensional magnetic interactions in LaFeAsO
Contributors	M Ramazanoglu (Iowa State U.), J Lamsal (Iowa State U.), GS Tucker (Iowa State U.), J-Q Yan (Oak Ridge National Lab.), S Calder (Oak Ridge National Lab.), T Guidi (STFC Rutherford Appleton Lab.), T Perring (STFC Rutherford Appleton Lab.), RW McCallum (Iowa State U.), TA Lograsso (Iowa State U.), A Kreyssig (Iowa State U.), AI Goldman (Iowa State U.), RJ McQueeney (Iowa State U.)
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.
Organisation	ISIS , ISIS-MERLIN , STFC
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Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Journal Article	Phys Rev B 87, no. 14 (2013): 140509.	doi:10.1103/PhysRevB.87.140509		2013