Two-dimensional magnetic interactions in LaFeAsO

M. Ramazanoglu; J. Lamsal; G. S. Tucker; J. Q. Yan; S. Calder; T. Guidi; T. Perring; R. W. McCallum; T. A. Lograsso; A. Kreyssig; A. I. Goldman; R. J. McQueeney

doi:10.1103/PhysRevB.87.140509

Two-dimensional magnetic interactions in LaFeAsO

M. Ramazanoglu^*, J. Lamsal, G. S. Tucker, J. Q. Yan, S. Calder, T. Guidi, T. Perring, R. W. McCallum, T. A. Lograsso, A. Kreyssig, A. I. Goldman, R. J. McQueeney

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

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 T_c.

Original language	English
Article number	140509
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	87
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.87.140509
Publication status	Published - 30 Apr 2013
Externally published	Yes

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title = "Two-dimensional magnetic interactions in LaFeAsO",

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.",

author = "M. Ramazanoglu and J. Lamsal and Tucker, {G. S.} and Yan, {J. Q.} and S. Calder and T. Guidi and T. Perring and McCallum, {R. W.} and Lograsso, {T. A.} and A. Kreyssig and Goldman, {A. I.} and McQueeney, {R. J.}",

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doi = "10.1103/PhysRevB.87.140509",

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T1 - Two-dimensional magnetic interactions in LaFeAsO

AU - Ramazanoglu, M.

AU - Lamsal, J.

AU - Tucker, G. S.

AU - Yan, J. Q.

AU - Calder, S.

AU - Guidi, T.

AU - Perring, T.

AU - McCallum, R. W.

AU - Lograsso, T. A.

AU - Kreyssig, A.

AU - Goldman, A. I.

AU - McQueeney, R. J.

PY - 2013/4/30

Y1 - 2013/4/30

N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevB.87.140509

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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ER -

Two-dimensional magnetic interactions in LaFeAsO

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