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
StatePublished - 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

Rare earths
Transition metals
Metal nanoparticles
rare earth elements
transition metals
alignment
nanoparticles
synthesis
Magnetic properties
Transition metal alloys
Annealing
magnetic properties
annealing
permanent magnets
Permanent magnets
Structural properties
Nanoparticles
Crystalline materials
Temperature
requirements

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).

Cluster synthesis, direct ordering, and alignment of rare-earth transition-metal nanomagnets. / Balamurugan, B.; Skomski, R.; Le Roy, Damien; Hadjipanayis, G. C.; Shield, J. E.; Sellmyer, D. J.

Energy Technology 2012: Carbon Dioxide Management and Other Technologies - Held During the TMS 2012 Annual Meeting and Exhibition. 2012. p. 385-390 (TMS Annual Meeting).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Balamurugan, B, Skomski, R, Le Roy, D, Hadjipanayis, GC, Shield, JE & Sellmyer, DJ 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. TMS Annual Meeting, pp. 385-390, Energy Technology 2012: Carbon Dioxide Management and Other Technologies - TMS 2012 Annual Meeting and Exhibition, Orlando, FL, United States, 3/11/12.
Balamurugan B, Skomski R, Le Roy D, Hadjipanayis GC, Shield JE, Sellmyer DJ. 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. 2012. p. 385-390. (TMS Annual Meeting).
Balamurugan, B. ; Skomski, R. ; Le Roy, Damien ; Hadjipanayis, G. C. ; Shield, J. E. ; Sellmyer, D. J. / Cluster synthesis, direct ordering, and alignment of rare-earth transition-metal nanomagnets. Energy Technology 2012: Carbon Dioxide Management and Other Technologies - Held During the TMS 2012 Annual Meeting and Exhibition. 2012. pp. 385-390 (TMS Annual Meeting).
@inproceedings{21b7ea0504fb4decb5f3062d5f57fa90,
title = "Cluster synthesis, direct ordering, and alignment of rare-earth transition-metal nanomagnets",
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.",
keywords = "Cluster-deposition, Direct ordering, Easy axis alignment, Magnetic nanoparticles",
author = "B. Balamurugan and R. Skomski and {Le Roy}, Damien and Hadjipanayis, {G. C.} and Shield, {J. E.} and Sellmyer, {D. J.}",
year = "2012",
month = "5",
day = "15",
language = "English (US)",
isbn = "9781118291382",
series = "TMS Annual Meeting",
pages = "385--390",
booktitle = "Energy Technology 2012",

}

TY - GEN

T1 - Cluster synthesis, direct ordering, and alignment of rare-earth transition-metal nanomagnets

AU - Balamurugan, B.

AU - Skomski, R.

AU - Le Roy, Damien

AU - Hadjipanayis, G. C.

AU - Shield, J. E.

AU - Sellmyer, D. J.

PY - 2012/5/15

Y1 - 2012/5/15

N2 - 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.

AB - 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.

KW - Cluster-deposition

KW - Direct ordering

KW - Easy axis alignment

KW - Magnetic nanoparticles

UR - http://www.scopus.com/inward/record.url?scp=84860831046&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860831046&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84860831046

SN - 9781118291382

T3 - TMS Annual Meeting

SP - 385

EP - 390

BT - Energy Technology 2012

ER -