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

2 Scopus citations

Abstract

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
Pages382-390
Number of pages9
ISBN (Print)9781118291382
DOIs
StatePublished - May 15 2012

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)

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    Balamurugan, B., Skomski, R., Roy, D. L., Hadjipanayis, G. C., Shield, J. E., & Sellmyer, D. J. (2012). Cluster Synthesis, Direct Ordering and Alignment of Rare-Earth Transition- Metal Nanomagnets. In Energy Technology 2012: Carbon Dioxide Management and Other Technologies (pp. 382-390). John Wiley and Sons. https://doi.org/10.1002/9781118365038.ch44