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Hybrid approach to the synthesis of FePt / Fe3B nanocomposite magnets

O. CRISAN1,* , M. ANGELAKERIS2, TH. KEHAGIAS2, G. FILOTI1

Affiliation

  1. National Institute for Materials Physics, P.O. Box MG-7, 077125 Bucharest-Magurele, Romania
  2. Dept. of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

Abstract

Exchange coupling between alternatively dispersed hard and soft magnetic phases, gives rise to exchange spring magnets with enhanced energy product (BH)max that are believed to represent a novel class of permanent magnets with improved properties. The synthesis of a hybrid nanocomposite system made of soft magnetic Fe3B melt spun ribbon and hard magnetic Fe-Pt thin film, obtained by e-beam co-deposition in ultrahigh vacuum onto the ribbons, is reported. Scanning electron microscopy, transmission electron microscopy and X-ray diffraction are used for structural characterization of these hybrid samples. Magnetic measurements provide observation of a drastic decrease of the saturation magnetization, compatible with the exchange coupling between hard and soft magnetic phases in the melt spun / thin film samples..

Keywords

Melt-spun ribbons, Thin films, Hard-soft magnetic materials, Hybrid nanocomposites.

Submitted at: Aug. 1, 2007
Accepted at: Sept. 18, 2007

Citation

O. CRISAN, M. ANGELAKERIS, TH. KEHAGIAS, G. FILOTI, Hybrid approach to the synthesis of FePt / Fe3B nanocomposite magnets, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 9, pp. 2734-2737 (2007)