Coercivity of a percolative magnetic system
Abstract:
A model that describes the behavior of the coercivity Hc, of coalescing Ni films, as a percolation phenomenon is presented. We show that there is a nonmonotonic dependence, of the coercive field as a function of the occupation probability p. This behavior is a function of cluster size and topology, and is independent of the growth direction of the thin film. Based on these ideas we predict theoretically, and confirm experimentally, the dependence of Hc as a function of external magnetic field orientation. For a [111] oriented fcc film, if p is less than the percolation threshold Pcr, a sixfold symmetry is observed. However, if p ≈ Pcr the percolation is isotropic.
Año de publicación:
2001
Keywords:
Fuente:

Tipo de documento:
Article
Estado:
Acceso restringido
Áreas de conocimiento:
- Campo magnético
- Magnetismo
- Ciencia de materiales
Áreas temáticas de Dewey:
- Magnetismo
- Ingeniería y operaciones afines
- Física aplicada

Objetivos de Desarrollo Sostenible:
- ODS 9: Industria, innovación e infraestructura
- ODS 12: Producción y consumo responsables
- ODS 8: Trabajo decente y crecimiento económico
