Anisotropic Three-Dimensional Magnetism in CaFe2As2
| Title | Anisotropic Three-Dimensional Magnetism in CaFe2As2 |
| Publication Type | Journal Article |
| Year of Publication | 2008 |
| Authors | McQueeney RJ, Diallo SO, Antropov VP, Samolyuk GD, Broholm C, Ni N, Nandi S, Yethiraj M, Zarestky JL, Pulikkotil JJ, Kreyssig A, Lumsden MD, Harmon BN, Canfield PC, Goldman AI |
| Journal Title | Physical Review Letters |
| Volume | 101 |
| Pages | 227205 |
| Date Published | 11/01 |
| Type of Article | Article |
| ISBN Number | 0031-9007 |
| Accession Number | ISI:000261214400058 |
| Keywords | fe, superconductivity |
| 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. |
| DOI | 10.1103/PhysRevLett.101.227205 |
| Alternate Journal | Phys. Rev. Lett. |
