Development of MnBi permanent magnet: Neutron diffraction of MnBi powder

Date
2014-03-05
Authors
Cui, J.
Choi, J. P.
Li, G.
Polikarpov, E.
Darsell, J.
Kramer, Matthew
Zarkevich, Nikolai
Wang, Linlin
Johnson, Duane
Marinescu, M.
Huang, Q. Z.
Vuong, N.
Liu, J. Ping
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Ames Laboratory
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Abstract

MnBi attracts great attention in recent years for its great potential as permanent magnetmaterials. MnBi phase is difficult to obtain because of the rather drastic peritectic reaction between Mn and Bi. In this paper, we report our effort on synthesizing high purity MnBi compound using conventional powder metallurgical approaches. Neutron diffraction was carried out to investigate the crystal and nuclear structure of the obtained powder. The result shows that the purity of the obtained powder is about 91 wt. % at 300 K, and the magnetic moment of the Mn atom in MnBi lattice is 4.424 and 4.013 μ B at 50 K and 300 K, respectively.

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The following article appeared in J. Appl. Phys. 115, 17A743 (2014); http://dx.doi.org/10.1063/1.4867230.

Keywords
Powders, Neutron diffraction, Permanent magnets, Magnetization measurement, Neutrons
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