Cluster Synthesis, Direct Ordering and Alignment of Rare-Earth Transition- Metal Nanomagnets

B. Balamurugan, R. Skomski, Damien Le Roy, G. C. Hadjipanayis, J. E. Shield, D. J. Sellmyer

Research output: Chapter in Book/Report/Conference proceedingChapter

3 Scopus citations


Rare-earth transition-metal (R-TM) alloys show superior permanent magnetic properties in the bulk, but the synthesis and application of R-TM nanoparticles remains a challenge due to the requirement of high-temperature annealing above about 800°C for alloy formation and subsequent crystalline ordering. Here we report a single-step method to produce highly ordered R-TM nanoparticles such as YCo5 and SmCo5, without high-temperature thermal annealing by employing a cluster-deposition system, and we investigate their structural and magnetic properties. Nanoparticles of size d ≤ 10 nm are monodispersed (σ/d≈ 0.15) and have Hc values at T = 300 K of 8.0 and 4.5 kOe for YCo5 and SmCo5, respectively. Alignment of the easy axes is performed via a field applied to the clusters before deposition. These processing steps are highly desirable to create and assemble R-TM nanoparticle composites for future permanentmagnet applications.

Original languageEnglish (US)
Title of host publicationEnergy Technology 2012
Subtitle of host publicationCarbon Dioxide Management and Other Technologies
PublisherJohn Wiley and Sons
Number of pages9
ISBN (Print)9781118291382
StatePublished - May 15 2012
Externally publishedYes


  • Cluster-deposition
  • Direct ordering
  • Easy axis alignment
  • Magnetic nanoparticles

ASJC Scopus subject areas

  • General Materials Science


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