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1. Thin Films

: The research projects of this line deal with the synthesis and characterization of materials like: iron oxides, magnetic semiconductors like doped titanium oxides, manganites, high critical temperature superconductors, thermoelectric materials and titanium nitrides, all of them in the form of thin films. Projects focused on the development of devices using bilayers and
multilayers based on the materials mentioned above and materials for potential use in spintronics and heterostructures are of our interest as well.
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2. Mössbauer Spectroscopy Topic

: The main goal of this line is contributing to the understanding of the magnetic, chemical, and structural properties among others of both pure and doped iron oxides and oxihidroxides. In this sense, several iron compounds are synthesized in our laboratory using different expeimental techniques like ball milling, hidrothermal methods and sol-gel. Samples coming from environment like corrosion products, rusts, soils, ores, sediments, meteorites and rocks are also of our interest.
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3. Nanoestructured Materials


: Finite size effects upon the physical properties of the so-called
nanostructured materials play a very important role nowdays from both the
basic and applied standpoints. Thus the decrease of the surface to volume
ratio, as can be the case in nanometric grains, nanoparticles or thin films,
is an important aspect for modifying the properties of these materials.
Concretely, in the field of magnetism, surface anisotropy can induce
perpendicular orientation of the magnetic moments on the surface and it can
even be dominant over the bulk anisotropy. These features have allowed
increasing in several orders of magnitude the densities of magnetic storage
like in the perpendicular recording media. However, the mechanisms for
explaining the changes on the magnetic properties of nanosized systems is
still a matter of debate and controversy.

 

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Grupo de Estado Sólido de la Universidad de Antioquia.
2001.

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