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Title

Capping-layer-induced magnetic coupling in a two-dimensional nanostructured system

AuthorsNavarro, E. ; Huttel, Yves ; Clavero Pérez, César ; Armelles Reig, Gaspar ; Cebollada, Alfonso
Keywordsiron
platinum
aluminium
nanostructured materials
superparamagnetism
island structure
polarisation
ferromagnetic-paramagnetic transitions
Kerr magneto-optical effect
Issue Date22-Mar-2004
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 84, 2139 (2004)
AbstractThe magnetic polarization of a Pt capping layer leads to an increase of the interisland magnetic coupling in a two-dimensional array of Fe islands. For small superparamagnetic islands, Pt deposition leads to a superparamagnetic–ferromagnetic transition. For larger ferromagnetic but weakly coupled islands, Pt deposition produces a stronger interisland coupling. Polar Kerr spectroscopy measurements and simulations evidence the magnetic polarization of Pt in contact with Fe. The described effects and their interpretation are supported by the use of a nonpolarizable Al capping, where both the superparamagnetic-to-ferromagnetic transition and the increase of the interisland coupling are absent.
Publisher version (URL)http://dx.doi.org/10.1063/1.1689739
URIhttp://hdl.handle.net/10261/23469
DOI10.1063/1.1689739
ISSN0003-6951
Appears in Collections:(IMN-CNM) Artículos
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