Pulse electric arc evaporation of graphite rods heavy doped with Nd₂O₃/Fe/B mixture or Nd₂Fe₁₄B(C) alloys is used to prepare nanostructured carbon-based magnetic materials and metallofullerenes. Chemical treatment of "magnetic soot" is used to evaluate perfectness of encapsulation of metal particles in carbon shells. Composition, structure and morphology of the material are studied by Rutherford backscattering spectrometry and concurrent nuclear reactions analysis of 2 MeV deuterons and by thermal neutron scattering. The results are discussed in comparison with earlier publications on Nd-Fe-B(C) and Sm-Co-C nanoparticulates. Metallofullerenes are separated from metallosoot by two-stage solvent extraction with o-xylene and dimethylformamide (DMFA) and analyzed by HPLC on Cosmosil BuckyPrep columns (Nacalai Tesque Inc.). Possible effect of presence of Boron and large amount of metals on yeild and composition of metallofullerene fraction is discussed.

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