Magnetism of new metastable cobalt-nitride compounds
- Nebraska Center for Materials and Nanoscience, Lincoln, NE (United States); Univ. of Nebraska, Lincoln, NE (United States). Dept. of Physics and Astronomy
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Nebraska Center for Materials and Nanoscience, Lincoln, NE (United States)
- Quantum Condensed Matter Division; Oak Ridge National Lab; Oak Ridge; USA
- Nebraska Center for Materials and Nanoscience; University of Nebraska; Lincoln; USA; Department of Physics and Astronomy
- Univ. Bayreuth, Bayreuth (Germany). Physikalisches Inst.
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 ($$J_s$$ = 1.28 T or 12.8 kG) and an appreciable uniaxial magnetocrystalline anisotropy ($$K_1$$ = 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.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Iowa State Univ., Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1543811
- Journal Information:
- Nanoscale, Vol. 10, Issue 27; ISSN 2040-3364
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
The Role of Non‐Metallic and Metalloid Elements on the Electrocatalytic Activity of Cobalt and Nickel Catalysts for the Oxygen Evolution Reaction
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journal | September 2019 |
Adaptive Genetic Algorithm for Optical Metasurfaces Design
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journal | July 2018 |
An efficient amplification strategy for N-doped NiCo 2 O 4 with oxygen vacancies and partial Ni/Co-nitrides as a dual-function electrode for both supercapatteries and hydrogen electrocatalysis
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journal | January 2019 |
The Role of Non-Metallic and Metalloid Elements on the Electrocatalytic Activity of Cobalt and Nickel Catalysts for the Oxygen Evolution Reaction | text | January 2019 |
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