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Magnetism of new metastable cobalt-nitride compounds

Title data

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. Vol. 10 (2018) Issue 27 . - pp. 13011-13021.
ISSN 2040-3372
DOI: https://doi.org/10.1039/c8nr02105h

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik XI - Funktionelle Nanostrukturen
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik XI - Funktionelle Nanostrukturen > Lehrstuhl Experimentalphysik XI - Funktionelle Nanostrukturen - Univ.-Prof. Dr. Axel Enders
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 11 Oct 2019 06:22
Last Modified: 11 Oct 2019 06:22
URI: https://eref.uni-bayreuth.de/id/eprint/52719