2024-03-29T12:55:26Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/254162016-02-16T07:33:15Zcom_10261_36com_10261_4col_10261_289
Anisotropy, hysteresis, and morphology of self-patterned epitaxial Fe/MgO/GaAs films
Cebollada, F.
Hernando-Mañeru, A.
Hernando, A.
Martínez Boubeta, Carlos
Cebollada, Alfonso
González, J. M.
The dependence of the effective anisotropy and of the magnetization reversal processes on the deposition temperature of a series of epitaxial Fe/MgO/GaAs films, grown by a combination of laser ablation and sputtering, has been discussed and correlated to their local morphology and crystallinity. The transverse susceptibility measurements have evidenced the presence of a fourfold effective anisotropy for all films, irrespective of their deposition temperature and local morphology, with a constant value very close to that of single-crystalline iron. The magnetization processes evolve with increasing deposition temperature from a nucleation-expansion-propagation mechanism, taking place in smooth continuous films, to pinning, occurring in self-patterned films with homogeneous distributions of defects, and then to fully isotropic reversal, for tiled films composed of rectangular elements.
2010-06-18T09:51:06Z
2010-06-18T09:51:06Z
2002-11-07
artículo
Physical Review B 66, 174410 (2002)
1098-0121
http://hdl.handle.net/10261/25416
10.1103/PhysRevB.66.174410
eng
http://dx.doi.org/10.1103/PhysRevB.66.174410
openAccess
American Physical Society