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 journalArticlepeer-review

22 Scopus citations


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
Issue number15
StatePublished - Apr 11 2016

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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