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Título: | Theoretical simulation of the anisotropic phases of antiferromagnetic thin films |
Autor: | Alonso, Juan J.; Fernández, Julio F. CSIC | Palabras clave: | Magnetic thin films Magnetic anisotropy Antiferromagnetic materials Exchange interactions (electron) Spin dynamics Magnetic transitions |
Fecha de publicación: | 15-nov-2006 | Editor: | American Physical Society | Citación: | Physical Review B 74(18): 184416.1-184416.9 (2006) | Resumen: | We simulate antiferromagnetic thin films. Dipole-dipole and antiferromagnetic exchange interactions as well as uniaxial and quadrupolar anisotropies are taken into account. Various phases unfold as the corresponding parameters J, D, and C, as well as the temperature T and the number n of film layer, vary. We find (i) how the strength of the anisotropy arising from dipole-dipole interactions varies with the number of layers away from the film's surface, with J and with n; (ii) a unified phase diagram for all n-layer films and bulk systems; (iii) a layer-dependent spin reorientation (SR) phase in which spins rotate continuously as T, D, C, and n vary; (iv) that the ratio of the SR to the ordering temperature depends (approximately) on n only through (D+/n)/C, and hardly on J; (v) a phase transformation between two different magnetic orderings, in which spin orientations may or may not change, for some values of J, by varying n. | Descripción: | 9 pages, 13 figures. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.74.184416 | URI: | http://hdl.handle.net/10261/19071 | DOI: | 10.1103/PhysRevB.74.184416 | ISSN: | 1098-0121 |
Aparece en las colecciones: | (ICMA) Artículos |
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