Anisotropic three-dimensional magnetism in CaFe2As2

R. J. McQueeney; S. O. Diallo; V. P. Antropov; G. D. Samolyuk; C. Broholm; N. Ni; S. Nandi; M. Yethiraj; J. L. Zarestky; J. J. Pulikkotil; A. Kreyssig; M. D. Lumsden; B. N. Harmon; P. C. Canfield; A. I. Goldman

doi:10.1103/PhysRevLett.101.227205

Anisotropic three-dimensional magnetism in CaFe2As2

R. J. McQueeney, S. O. Diallo, V. P. Antropov, G. D. Samolyuk, C. Broholm, N. Ni, S. Nandi, M. Yethiraj, J. L. Zarestky, J. J. Pulikkotil, A. Kreyssig, M. D. Lumsden, B. N. Harmon, P. C. Canfield, A. I. Goldman

Microstructural Evolution Modeling

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Abstract

Inelastic neutron scattering measurements of the magnetic excitations in CaFe2As2 indicate that the spin wave velocity in the Fe layers is exceptionally large and similar in magnitude to the cuprates. However, the spin wave velocity perpendicular to the layers is at least half as large that in the layer, so that the magnetism is more appropriately categorized as anisotropic three-dimensional, in contrast to the two-dimensional cuprates. Exchange constants derived from band structure calculations predict spin wave velocities that are consistent with the experimental data.

Original language	English
Article number	227205
Journal	Physical Review Letters
Volume	101
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.101.227205
State	Published - Nov 26 2008

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McQueeney, R. J., Diallo, S. O., Antropov, V. P., Samolyuk, G. D., Broholm, C., Ni, N., Nandi, S., Yethiraj, M., Zarestky, J. L., Pulikkotil, J. J., Kreyssig, A., Lumsden, M. D., Harmon, B. N., Canfield, P. C., & Goldman, A. I. (2008). Anisotropic three-dimensional magnetism in CaFe2As2. Physical Review Letters, 101(22), Article 227205. https://doi.org/10.1103/PhysRevLett.101.227205

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title = "Anisotropic three-dimensional magnetism in CaFe2As2",

abstract = "Inelastic neutron scattering measurements of the magnetic excitations in CaFe2As2 indicate that the spin wave velocity in the Fe layers is exceptionally large and similar in magnitude to the cuprates. However, the spin wave velocity perpendicular to the layers is at least half as large that in the layer, so that the magnetism is more appropriately categorized as anisotropic three-dimensional, in contrast to the two-dimensional cuprates. Exchange constants derived from band structure calculations predict spin wave velocities that are consistent with the experimental data.",

author = "McQueeney, {R. J.} and Diallo, {S. O.} and Antropov, {V. P.} and Samolyuk, {G. D.} and C. Broholm and N. Ni and S. Nandi and M. Yethiraj and Zarestky, {J. L.} and Pulikkotil, {J. J.} and A. Kreyssig and Lumsden, {M. D.} and Harmon, {B. N.} and Canfield, {P. C.} and Goldman, {A. I.}",

year = "2008",

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doi = "10.1103/PhysRevLett.101.227205",

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AU - McQueeney, R. J.

AU - Diallo, S. O.

AU - Antropov, V. P.

AU - Samolyuk, G. D.

AU - Broholm, C.

AU - Ni, N.

AU - Nandi, S.

AU - Yethiraj, M.

AU - Zarestky, J. L.

AU - Pulikkotil, J. J.

AU - Kreyssig, A.

AU - Lumsden, M. D.

AU - Harmon, B. N.

AU - Canfield, P. C.

AU - Goldman, A. I.

PY - 2008/11/26

Y1 - 2008/11/26

N2 - Inelastic neutron scattering measurements of the magnetic excitations in CaFe2As2 indicate that the spin wave velocity in the Fe layers is exceptionally large and similar in magnitude to the cuprates. However, the spin wave velocity perpendicular to the layers is at least half as large that in the layer, so that the magnetism is more appropriately categorized as anisotropic three-dimensional, in contrast to the two-dimensional cuprates. Exchange constants derived from band structure calculations predict spin wave velocities that are consistent with the experimental data.

AB - Inelastic neutron scattering measurements of the magnetic excitations in CaFe2As2 indicate that the spin wave velocity in the Fe layers is exceptionally large and similar in magnitude to the cuprates. However, the spin wave velocity perpendicular to the layers is at least half as large that in the layer, so that the magnetism is more appropriately categorized as anisotropic three-dimensional, in contrast to the two-dimensional cuprates. Exchange constants derived from band structure calculations predict spin wave velocities that are consistent with the experimental data.

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DO - 10.1103/PhysRevLett.101.227205

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VL - 101

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ER -

Anisotropic three-dimensional magnetism in CaFe2As2

Abstract

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