Journal of Materials Science

, Volume 46, Issue 18, pp 6065–6074 | Cite as

Self-nanoscaling of the soft magnetic phase in bulk SmCo/Fe nanocomposite magnets

  • Chuanbing Rong
  • Ying Zhang
  • Narayan Poudyal
  • Izabela Szlufarska
  • Rainer J. Hebert
  • M. J. Kramer
  • J. Ping LiuEmail author


Fabrication of bulk nanocomposite materials, which contain a magnetically hard phase and a magnetically soft phase with desired nanoscale morphology and composition distribution has proven to be challenging. Here we demonstrate that SmCo/Fe(Co) hard/soft nanocomposite materials can be produced by distributing the soft magnetic α-Fe(Co) phase particles homogenously in a hard magnetic SmCo phase matrix through a combination of high-energy ball milling and a warm compaction. Severe plastic deformation during the ball milling results in nanoscaling of the soft phase with size reduction from micrometers to ~15 nm. Up to 35% of the soft phase can be incorporated into the composites without coarsening. This process produces fully dense bulk isotropic nanocomposite materials with remarkable energy-product enhancement (up to 300%) owing to effective inter-phase exchange coupling.


FePt Exchange Coupling Hard Phase Soft Phase Nanocomposite Magnet 



This work has been supported in part by the US Office of Naval Research/MURI project under Grant N00014-05-1-049, US DoD/DARPA/ARO under Grant W911NF-08-1-0249, and by the University of Texas-Arlington. Work at the Ames laboratory was supported in part by the US Department of Energy, Office of Basic Energy Science, under contract DE-AC02-07CH11358.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Chuanbing Rong
    • 1
  • Ying Zhang
    • 1
    • 2
  • Narayan Poudyal
    • 1
  • Izabela Szlufarska
    • 3
  • Rainer J. Hebert
    • 4
  • M. J. Kramer
    • 2
  • J. Ping Liu
    • 1
    Email author
  1. 1.Department of PhysicsUniversity of Texas at ArlingtonArlingtonUSA
  2. 2.Division of Materials Science and Engineering, Ames LaboratoryIowa State UniversityAmesUSA
  3. 3.Department of Materials Science & EngineeringUniversity of Wisconsin at MadisonMadisonUSA
  4. 4.Department of Chemical, Materials & Biomolecular EngineeringUniversity of ConnecticutStorrsUSA

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