High-coercivity magnetism in nanostructures with strong easy-plane anisotropy

Balamurugan Balasubramanian, Priyanka Manchanda, Ralph Skomski, Pinaki Mukherjee, Shah R. Valloppilly, Bhaskar Das, George C. Hadjipanayis, David J Sellmyer

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We report the fabrication of a rare-earth-free permanent-magnet material Co3Si in the form of nanoparticles and investigate its magnetic properties by experiments and density-functional theory (DFT). The DFT calculations show that bulk Co3Si has an easy-plane anisotropy with a high K1 ≈ -64 Merg/cm3 (-6.4 MJ/m3) and magnetic polarization of 9.2 kG (0.92 T). In spite of having a negative anisotropy that generally leads to negligibly low coercivities in bulk crystals, Co3Si nanoparticles exhibit high coercivities (17.4 kOe at 10 K and 4.3 kOe at 300 K). This result is a consequence of the unique nanostructure made possible by an effective easy-axis alignment in the cluster-deposition method and explained using micromagnetic analysis as a nanoscale phenomenon involving quantum-mechanical exchange interactions.

Original languageEnglish (US)
Article number152406
JournalApplied Physics Letters
Volume108
Issue number15
DOIs
StatePublished - Apr 11 2016

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coercivity
density functional theory
nanoparticles
anisotropy
permanent magnets
rare earth elements
alignment
magnetic properties
fabrication
polarization
crystals
interactions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Balasubramanian, B., Manchanda, P., Skomski, R., Mukherjee, P., Valloppilly, S. R., Das, B., ... Sellmyer, D. J. (2016). High-coercivity magnetism in nanostructures with strong easy-plane anisotropy. Applied Physics Letters, 108(15), [152406]. https://doi.org/10.1063/1.4945987

High-coercivity magnetism in nanostructures with strong easy-plane anisotropy. / Balasubramanian, Balamurugan; Manchanda, Priyanka; Skomski, Ralph; Mukherjee, Pinaki; Valloppilly, Shah R.; Das, Bhaskar; Hadjipanayis, George C.; Sellmyer, David J.

In: Applied Physics Letters, Vol. 108, No. 15, 152406, 11.04.2016.

Research output: Contribution to journalArticle

Balasubramanian, B, Manchanda, P, Skomski, R, Mukherjee, P, Valloppilly, SR, Das, B, Hadjipanayis, GC & Sellmyer, DJ 2016, 'High-coercivity magnetism in nanostructures with strong easy-plane anisotropy', Applied Physics Letters, vol. 108, no. 15, 152406. https://doi.org/10.1063/1.4945987
Balasubramanian B, Manchanda P, Skomski R, Mukherjee P, Valloppilly SR, Das B et al. High-coercivity magnetism in nanostructures with strong easy-plane anisotropy. Applied Physics Letters. 2016 Apr 11;108(15). 152406. https://doi.org/10.1063/1.4945987
Balasubramanian, Balamurugan ; Manchanda, Priyanka ; Skomski, Ralph ; Mukherjee, Pinaki ; Valloppilly, Shah R. ; Das, Bhaskar ; Hadjipanayis, George C. ; Sellmyer, David J. / High-coercivity magnetism in nanostructures with strong easy-plane anisotropy. In: Applied Physics Letters. 2016 ; Vol. 108, No. 15.
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