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 proceedingConference contribution

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 YCo 5 and SmCo 5, 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 H c values at T = 300 K of 8.0 and 4.5 kOe for YCo 5 and SmCo 5, 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 permanent-magnet applications.

Original languageEnglish (US)
Title of host publicationEnergy Technology 2012
Subtitle of host publicationCarbon Dioxide Management and Other Technologies - Held During the TMS 2012 Annual Meeting and Exhibition
Pages385-390
Number of pages6
Publication statusPublished - May 15 2012
EventEnergy Technology 2012: Carbon Dioxide Management and Other Technologies - TMS 2012 Annual Meeting and Exhibition - Orlando, FL, United States
Duration: Mar 11 2012Mar 15 2012

Publication series

NameTMS Annual Meeting

Conference

ConferenceEnergy Technology 2012: Carbon Dioxide Management and Other Technologies - TMS 2012 Annual Meeting and Exhibition
CountryUnited States
CityOrlando, FL
Period3/11/123/15/12

    Fingerprint

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Balamurugan, B., Skomski, R., Le Roy, D., 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 - Held During the TMS 2012 Annual Meeting and Exhibition (pp. 385-390). (TMS Annual Meeting).