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

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

91 Scopus citations

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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10.1103/PhysRevLett.101.227205

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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",

month = nov,

day = "26",

doi = "10.1103/PhysRevLett.101.227205",

language = "English",

volume = "101",

journal = "Physical Review Letters",

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T1 - Anisotropic three-dimensional magnetism in CaFe2As2

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.

UR - https://www.scopus.com/pages/publications/57149098040

U2 - 10.1103/PhysRevLett.101.227205

DO - 10.1103/PhysRevLett.101.227205

M3 - Article

AN - SCOPUS:57149098040

SN - 0031-9007

VL - 101

JO - Physical Review Letters

JF - Physical Review Letters

IS - 22

M1 - 227205

ER -

Anisotropic three-dimensional magnetism in CaFe2As2

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