Abstract
Interfacial aspects play an important role in the magnetic and structural properties of magnetic thin film systems such as giant or tunnel magneto-resistance devices or storage media applications. However the role of the interaction of atoms in interfaces or close to interfaces is difficult to access experimentally, as the magnetism has to be probed on an atomic level. Not many methods with a suitable resolution in time, space and selectivity are available for such systems. One among them is depth selective Mössbauer spectroscopy which is ideally suited for such investigations due its its sensitivity and depth resolution. In addition, the method is isotope selective allowing probing of defined regions. Systems with perpendicular anisotropy such as FePt or CoPt are thought to play a key role in the future of high density storage media applications, although the magnetic interaction of adjacent Fe and Pt atoms is not entirely understood. In this study, the magnetic properties of a single Fe-Pt interface evaluated with atomic resolution as a function of temperature. It is possible to determine the temperature behaviour as well as the ground state properties as a function of distance to the interface with a resolution of one monolayer (ML).
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