FP6 priority
1.1.3   Nanotechnologies and Nanosciences, Knowledge-based Multifunctional Materials and New Production Processes and Devices
Title of the proposal

Advanced nanostructured magnetic materials with improved functional properties

Slovak Academy of Sciences, Institute of Experimental Physics
Watsonova 47, O43 53 Kosice, Slovak Republic
+421 55 6338115

Research subject for a potential FP6 project

The research objectives of the project focus on the better understanding of the composition-structure-property relationships in advanced nano-phased magnetic materials, where the nano-sized building blocks are arranged into different topological order. The materials of our interest include: i) the soft magnetic materials with bcc-Fe, Fe(Si) and FeCo nanoparticles embedded in a residual amorphous matrix either in the form of ribbons and/or in the form of densely arranged and compacted powder, ii) nano-composite materials based on Fe, Co, Ni and RE-elements where the building units are formed by chemically identical nanoparticles and/or nanocapsules having core/shell structure. Of particular interest is to better understand the effects of the variation of grain sizes and the intergranular distances as well as the chemistry of the constituent phases on the magnetic behaviour in a wide range of applied fields and temperatures.
The aims of a potential FP6 project can be outlined in the following way:
  • optimization of the alloys composition and the preparation methods in order to obtain nanostructured magnetic materials with improved functional properties
  • study the effects of residual amorphous matrix as well as the grain sizes and intergranular distances on the character and intensity of magnetic coupling between grains and on the magnetic behavior versus temperature in investigated nanocrystalline magnetic materials
  • study the magnetocaloric behaviour in selected nano-composite materials
  • better understand the influence of interfaces on the magnetic properties of investigated nanostructured materials

  • Recent international cooperation of the research team

    Institute of Applied Physics, University Hamburg, Germany, Institute of Material Research, Forschugszentrum-Geesthacht, Germany, Laboratoire de Physique de l` Etat Condense CNRS, University Le Mans, France, Warsaw University, Warsaw, Poland, Institute of Experimental Physics, Technical University Vienna, Austria, Institute of Physics, PAS, Warsaw, Poland; Institute of Molecular Physics, PAS, Poznan, Poland; International Centre for Material Physics, Academia Sinica, Shenyang, China, CBPF Rio de Janeiro, Brasil

    Proposerīs relevant publications related to the research subject

    1. I. Skorvanek, S. Skwirblies and J. Kotzler, Magnetic hardening and spin-glass phenomena in nanocrystalline FeNbB at low temperatures, Phys. Rev. B 46 (2001) 184437
    2. I. Skorvanek, R. Grossinger, Low-temperature Magnetic Hardening and Exchange Anisotropy in Nanocrystalline FeNbCrBCu Alloys, J. Magn. Magn. Mater. 226 (2001) 1473
    3. Z.D. Zhang, J.L. Yu, J.G. Zheng, I. Skorvanek, J. Kovac, X.L. Dong, Z.J. Li, S.R. Lin, H.C.Yang, Z.J. Guo, W. Liu, X.G. Zhao, Structure and magnetic properties of boron-oxide-coated Fe(B) nanocapsules prepared by arc discharge in diborane, Phys Rev B 46 (2001) 024404
    4. I.Skorvanek, P. Svec, J.-M. Grenèche, J. Kovac, J. Marcin and R. Gerling, Influence of microstructure on the magnetic and mechanical behaviour of amorphous and nanocrystalline FeNbB alloys, J. Phys.: Condens. Matter 14 (2002) accepted