Speakers: Josef Redinger (Center for Computational Materials Science, Technische Universität Wien)
Place: Na Slovance, lecture room No 117
Presented in English
Organisers:
Department of Condensed Matter Theory
Abstract: Depending on the detailed interface, rocksalt CoO may grow in different orientations on the Ir(100) surface and thus strongly influence magnetic and structural properties. First principles calculations elucidate the driving forces behind. For ultra thin CoO(111) films supported on Ir(100) a close relationship between the local structural properties of the oxide film and the induced magnetic order is found, leading to alternating ferromagnetically and antiferromagnetically ordered segments. While the local magnetic order is directly related to the geometric position of the Co atoms, the mismatch between the CoO film and the Ir substrate leads to a complex long-range order of the oxide. The lateral modulation of the structural elements within the oxide film can be understood as a combination of the lateral variation in the Co-Ir binding potential and additional O-Ir binding.
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