Self-organized semiconductor surfaces as templates for nanostructured magnetic thin films |
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Authors: | C Teichert |
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Institution: | 1.Institut für Physik, Montanuniversit?t Leoben, Franz Josef Str. 18, 8700 Leoben, Austria,AT |
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Abstract: | Spontaneous pattern formation during epitaxial growth or ion erosion of semiconductor wafers offers an elegant route towards
large-area nanostructured surfaces. In homoepitaxy, kinetics may result in rather uniform three-dimensional islands. In the
case of semiconductor heteroepitaxy, strain relief leads to the formation of nanofaceted three-dimensional crystallites, which
may self-organize into quasiperiodic arrays. By tuning substrate miscut and film thickness, or growing superlattices, a variety
of patterns with different symmetries can be obtained, as will be summarized for the model system of SiGe on Si(001). Since
these self-organized nanostructure arrays cover the entire wafer on which they are grown, they can serve as large-area nanopatterned
substrates for subsequent deposition of magnetic thin films. It will be demonstrated that such templates allow the study of
correlations between magnetic and chemical interfacial roughness, as well as the influence of pattern symmetry on the magnetic
anisotropy of thin Co films. Furthermore, shadow deposition of magnetic material onto specially faceted nanostructure arrays
allows the fabrication of nanomagnet arrays and the study of their magnetic properties.
Received: 31 July 2002 / Accepted: 2 October 2002 / Published online: 5 February 2003
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ID="*"Corresponding author. Fax: +43-3842/402-760, E-mail: teichert@unileoben.ac.at |
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Keywords: | PACS: 68 55-a 68 37 Ps 75 70 -i 75 75 +a |
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