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Dynamics in Nano-scale Materials Studied with Synchrotron Radiation (DYNASYNC) - Publishable Final Activity Report

Project ID: 1516
Funded under: FP6-NMP


Dynamical properties of condensed matter are of paramount importance for the functionality of future nanoscale devices. The role of the interfaces between adjacent materials becomes increasingly relevant with decreasing size of the structural units, and novel dynamical phenomena are expected in these nanostructures. Since the properties of low-dimensional structures are significantly different from those of corresponding bulk materials, new methods have to be developed for the experimental characterization and the theoretical modelling. An efficient way to achieve it is to use the extremely brilliant x-rays from modern synchrotron radiation sources like the European Synchrotron Radiation Facility (ESRF) to study the dynamical properties under ultrahigh vacuum (UHV) conditions. We will show how powerful nuclear resonant scattering of synchrotron radiation is in studying vibrational properties, diffusion and growth, and magnetic processes especially concerning its high spatial and temporal resolution.
The overall objective of the Project is to increase the basic understanding of dynamic phenomena and in particular of their size dependence in nanostructures. The combination of nuclear resonant scattering experiments with advanced surface sensitive experimental and computational methods yields detailed insights into the following areas:
- The modification of collective excitations like phonons by interfaces and boundaries in thin films, multilayers, and nanoparticles.
- The role of diffusion in the kinetics of structural changes that occur during processing of materials or the growth of thin films.
- The dynamical magnetic properties of nanostructures, the evolution of magnetic properties during growth and the interlayer coupling of magnetic layers, as they determine the fast magnetization reversal and the ultimate magnetic storage density

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