| Revista: | Superficies y vacío |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000395120 |
| ISSN: | 1665-3521 |
| Autores: | Sosa Hernández, E.M1 Alvarado Leyva, P.G2 |
| Instituciones: | 1Universidad Autónoma de San Luis Potosí, Facultad de Contaduría y Administración, San Luis Potosí. México 2Universidad Autónoma de San Luis Potosí, Facultad de Ciencias, San Luis Potosí. México |
| Año: | 2007 |
| Periodo: | Mar |
| Volumen: | 20 |
| Número: | 1 |
| Paginación: | 8-13 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico |
| Resumen en inglés | The magnetic behavior of clusters Cr6-Cr9 in bulk Fe is determined by using an electronic Hamiltonian which includes s, p and d electrons. The spin density distribution is calculated self-consistenly in the unrestricted Hartree-Fock approximation. The local magnetic moments μ (i) are obtained at various atoms i of Cr clusters and of the surrounding matrix. The local magnetic moments at Fe atoms and the magnetic moments of Cr atoms present an antiparallel coupling. The magnetic behavior of Cr clusters depends on two factors, the size of the cluster and the proximity between them. For Cr6 the magnetic moments at Cr atoms are parallel whereas for Cr9 the μCr(i) are antiparallel. The magnetic order in the matrix is not broken by the presence of the Cr atoms, but the local magnetic moments of Fe atoms in the interface cluster-matrix are reduced respect to Fe bulk magnetization. [v.g. μFe(5')=2μB in Cr6; μFe(3)=1.8μB in Cr9] |
| Disciplinas: | Física y astronomía, Química |
| Palabras clave: | Electromagnetismo, Física, Fisicoquímica y química teórica, Hamiltonianos, Materiales magnéticos, Hartree-Fock, Momento magnético |
| Keyword: | Physics and astronomy, Chemistry, Electromagnetism, Physics, Physical and theoretical chemistry, Hamiltonians, Magnetic materials, Hartree-Fock, Magnetic moment |
| Texto completo: | Texto completo (Ver PDF) |
