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Persistent URL	http://purl.org/net/epubs/work/50832
Record Status	Checked
Record Id	50832
Title	High-energy spin excitations in BaFe2As2 observed by inelastic neutron scattering
Contributors	RA Ewings (STFC Rutherford Appleton Lab.) (Pr.Au.), TG Perring (STFC Rutherford Appleton Lab.), RI Bewley (STFC Rutherford Appleton Lab.), T Guidi (STFC Rutherford Appleton Lab.), MJ Pitcher (Oxford U.), DR Parker (Oxford U.), SJ Clarke (Oxford U.), AT Boothroyd (Oxford U.)
Abstract	We report neutron-scattering measurements of cooperative spin excitations in antiferromagnetically ordered BaFe2As2, the parent phase of an iron pnictide superconductor. The data extend up to similar to 100 meV and show that the spin excitation spectrum is sharp and highly dispersive. By fitting the spectrum to a linear spin-wave model we estimate the magnon bandwidth to be in the region of 0.17 eV. The large characteristic spin-fluctuation energy suggests that magnetism could play a role in the formation of the superconducting state.
Organisation	ISIS , ISIS-MERLIN , STFC
Keywords	Physics
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Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Journal Article	Phys Rev B 78, no. 22 (2008): 220501.	doi:10.1103/PhysRevB.78.220501		2008