In-cluster-structured exchange-coupled magnets with high energy densities

X. Rui, J. E. Shield, Z. Sun, Y. Xu, D. J. Sellmyer

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


In this letter, the authors demonstrate isotropic Fe-Pt exchange-spring nanocomposite permanent magnets with a soft magnetic phase fraction of greater than 0.5 with a coercivity of 6.5 kOe, single-phase-like magnetic behavior, and an energy product of 25.1 MG Oe. Sub-10-nm Fe-Pt clusters are formed with compositions in the two-phase Fe3Pt and FePt regions. Intracluster structuring on a scale of a few nanometers occurs after appropriate heat treatment. This ensures full exchange coupling between the two phases, allowing greater soft magnetic phase fractions. The results provide insight into developing high energy product nanostructured permanent magnets.

Original languageEnglish (US)
Article number122509
JournalApplied Physics Letters
Issue number12
StatePublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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