Magnetism of new metastable cobalt-nitride compounds

Balamurugan Balasubramanian, Xin Zhao, Shah R. Valloppilly, Sumit Beniwal, Ralph Skomski, Anandakumar Sarella, Yunlong Jin, Xingzhong Li, Xiaoshan Xu, Huibo Cao, Haohan Wang, Axel Enders, Cai Zhuang Wang, Kai Ming Ho, David J. Sellmyer

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The search for new magnetic materials with high magnetization and magnetocrystalline anisotropy is important for a wide range of applications including information and energy processing. There is only a limited number of naturally occurring magnetic compounds that are suitable. This situation stimulates an exploration of new phases that occur far from thermal-equilibrium conditions, but their stabilization is generally inhibited due to high positive formation energies. Here a nanocluster-deposition method has enabled the discovery of a set of new non-equilibrium Co-N intermetallic compounds. The experimental search was assisted by computational methods including adaptive-genetic-algorithm and electronic-structure calculations. Conventional wisdom is that the interstitial or substitutional solubility of N in Co is much lower than that in Fe and that N in Co in equilibrium alloys does not produce materials with significant magnetization and anisotropy. By contrast, our experiments identify new Co-N compounds with favorable magnetic properties including hexagonal Co3N nanoparticles with a high saturation magnetic polarization (Js = 1.28 T or 12.8 kG) and an appreciable uniaxial magnetocrystalline anisotropy (K1 = 1.01 MJ m-3 or 10.1 Mergs per cm3). This research provides a pathway for uncovering new magnetic compounds with computational efficiency beyond the existing materials database, which is significant for future technologies.

Original languageEnglish (US)
Pages (from-to)13011-13021
Number of pages11
JournalNanoscale
Volume10
Issue number27
DOIs
StatePublished - Jul 21 2018

Fingerprint

Magnetocrystalline anisotropy
Magnetism
Cobalt
Nitrides
Magnetization
Nanoclusters
Magnetic materials
Saturation magnetization
Computational methods
Adaptive algorithms
Computational efficiency
Intermetallics
Electronic structure
Magnetic properties
Anisotropy
Stabilization
Solubility
Genetic algorithms
Polarization
Nanoparticles

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Balasubramanian, B., Zhao, X., Valloppilly, S. R., Beniwal, S., Skomski, R., Sarella, A., ... Sellmyer, D. J. (2018). Magnetism of new metastable cobalt-nitride compounds. Nanoscale, 10(27), 13011-13021. https://doi.org/10.1039/c8nr02105h

Magnetism of new metastable cobalt-nitride compounds. / Balasubramanian, Balamurugan; Zhao, Xin; Valloppilly, Shah R.; Beniwal, Sumit; Skomski, Ralph; Sarella, Anandakumar; Jin, Yunlong; Li, Xingzhong; Xu, Xiaoshan; Cao, Huibo; Wang, Haohan; Enders, Axel; Wang, Cai Zhuang; Ho, Kai Ming; Sellmyer, David J.

In: Nanoscale, Vol. 10, No. 27, 21.07.2018, p. 13011-13021.

Research output: Contribution to journalArticle

Balasubramanian, B, Zhao, X, Valloppilly, SR, Beniwal, S, Skomski, R, Sarella, A, Jin, Y, Li, X, Xu, X, Cao, H, Wang, H, Enders, A, Wang, CZ, Ho, KM & Sellmyer, DJ 2018, 'Magnetism of new metastable cobalt-nitride compounds', Nanoscale, vol. 10, no. 27, pp. 13011-13021. https://doi.org/10.1039/c8nr02105h
Balasubramanian B, Zhao X, Valloppilly SR, Beniwal S, Skomski R, Sarella A et al. Magnetism of new metastable cobalt-nitride compounds. Nanoscale. 2018 Jul 21;10(27):13011-13021. https://doi.org/10.1039/c8nr02105h
Balasubramanian, Balamurugan ; Zhao, Xin ; Valloppilly, Shah R. ; Beniwal, Sumit ; Skomski, Ralph ; Sarella, Anandakumar ; Jin, Yunlong ; Li, Xingzhong ; Xu, Xiaoshan ; Cao, Huibo ; Wang, Haohan ; Enders, Axel ; Wang, Cai Zhuang ; Ho, Kai Ming ; Sellmyer, David J. / Magnetism of new metastable cobalt-nitride compounds. In: Nanoscale. 2018 ; Vol. 10, No. 27. pp. 13011-13021.
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