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Effect of a capping layer on the magnetic properties of island nanostructured Fe(110)

AuthorsCalleja, J. F.; Contreras, M. C.; Matarranz, R.; Navarro, E. ; Huttel, Yves ; Cebollada, Alfonso ; Armelles Reig, Gaspar
Ferromagnetic materials
Magnetic anisotropy
Nanostructured materials
Magnetisation reversal
Magnetic susceptibility
Magnetic particles
Interface magnetism
Issue Date28-Apr-2005
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 97, 104302 (2005)
AbstractWe present a study on the magnetic anisotropy and magnetization reversal of Fe(110) islands grown on Al2O3 versus the island size, the island size distribution, and the magnetic interaction between islands. For small islands magnetically connected via a polarizable capping layer, the samples behave as a uniform film with an induced uniaxial in-plane anisotropy. Magnetically isotropic samples are obtained when the islands size is increased. Transverse susceptibility measurements show that the magnetic anisotropy of the particles is macroscopically averaged due to the interisland magnetic interaction. The island size distribution is correlated to the magnetic anisotropy field dispersion. When the capping layer material is Al, a superparamagnetic behavior is found due to the absence of the interisland interaction.
Publisher version (URL)http://link.aip.org/link/?JAPIAU/97/104302/1
Appears in Collections:(IMN-CNM) Artículos
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