Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 586, Issue -, Pages 349-352Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.10.067
Keywords
MnBi; Rare earth free magnets; Mechanochemical process; Nanocomposites
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Funding
- Siemens
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MnBi nanoparticles with size in the range 100-300 nm were fabricated from a mixture of Bi2O3 and Mn in the presence of Ca as reducing element by a mechanochemical process. Heat treatment of as-milled powder and subsequent washing yielded nanoparticles with composite morphology of MnBi/Bi. Nanoparticles were crystallographically anisotropic and displayed high remanence ratio (M-r/M-s) of 0.94 and high coercivity (H-c) of 16.3 kOe at room temperature. The spin reorientation temperature of the MnBi nanoparticles was found to be at 119 K showing an increase by 10 K as compared to the bulk sample. (C) 2013 Elsevier B. V. All rights reserved.
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