B5: Magnetic and electric properties of oxide superlattices with ultrathin single layers
In this project the electric and magnetic properties of superlattices that consist of oxide layers with a thickness less than five unit cells, are investigated. The focus will be on the study of the interplay between the structural symmetry of the single layers as well as the interfacial coupling in relation to the magnetization, magnetotransport and polarization properties of the superlattices. As an example superlattices consisting of SrRuO3 and Pr0.7Ca0.3MnO3 layers may be mentioned: in these a structural transition of the SrRuO3 layers from orthorhombic to tetragonal symmetry occurs, when the thickness of the Pr0.7Ca0.3MnO3 layers is varied. This transition is certainly induced by strain, but might probably be influenced by the antiferromagnetic interface exchange coupling.
In these heterostructures strongly correlated two dimensional electron gases might appear that will be studied in detail. Beyond the vertical restriction by the film thickness, the switching processes of the magnetization and the electrical polarization should be further studied in lateral nanostructures.
Principal Investigators
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Prof. Dr. Michael Ziese ⇒
phone: +49 (0) 341/97 32752 fax: +49 (0) 341/97 32668 |
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Prof. Dr. Pablo D. Esquinazi ⇒
phone: +49 (0) 341/97 32751 fax: +49 (0) 341/97 32668 |
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