J. Phys. IV France 08 (1998) Pr2-47-Pr2-50
Investigation of the structural properties of crystallized Fe-(Cu)-Sm-B ribbonsO. Crisan1, 2, J.M. Le Breton2, F. Machizaud3, A. Jianu1, J. Teillet2 and G. Filoti1
1 Institute of Physics and Technology of Materials, P.O. Box MG-7, 76900 Bucharest-Magurele Romania
2 Magnétisme et Applications, GMP UMR 6634 du CNRS, Université de Rouen, 76821 Mont-Saint-Aignan cedex, France
3 LSG2M, École des Mines, Parc de Saurupt, URA 159 du CNRS, Université de Nancy, 54042 Nancy cedex, France
Crystallized Fe-(Cu)-Sm-B ribbons were investigated by means of X-ray diffraction, differential scanning calorimetry and Mössbauer spectrometry. The bec α-Fe, tetragonal Fe3B and tetragonal Fe2B phases were found to crystallize after appropriate annealing. The relative proportion of α-Fe decreases with increasing Sm content, in agreement with the increase of the crystallization point. The metastable Fe3B phase decomposition into α-Fe and Fe2B was observed within a wide range of annealing temperature. The Sm ions randomly accommodate the Fe sites in the Fe3B lattice. After cumulative annealing at higher temperatures, the tetragonal Sm1.1Fe4B4 paramagnetic phase is found.
© EDP Sciences 1998