Magnetic properties of large-scaled MnBi bulk magnets

Sumin Kim, Hongjae Moon, Hwaebong Jung, Su Min Kim, Hyun Sook Lee, Haein Choi-Yim, Wooyoung Lee

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Abstract

We investigated the magnetic properties of large, compacted, sintered MnBi bulk magnets with dimensions of 20.3 × 15.3 × 10.3 mm3. To obtain a high content of the low-temperature-phase (LTP) of MnBi in the precursor powders, a new process was implemented and produced about 98 wt% of LTP. To improve the coercive field of MnBi, particle sizes were controlled using different milling techniques. The dependence of magnetic properties of the bulk magnets on the particle size was analyzed. The highest maximum energy product, (BH)max, obtained among our samples was 7.3 MGOe. This is the first report of demonstrating high performance in large-sized MnBi bulk magnets.

Original languageEnglish
Pages (from-to)1245-1249
Number of pages5
JournalJournal of Alloys and Compounds
Volume708
DOIs
Publication statusPublished - 2017 Jan 1

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All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Kim, S., Moon, H., Jung, H., Kim, S. M., Lee, H. S., Choi-Yim, H., & Lee, W. (2017). Magnetic properties of large-scaled MnBi bulk magnets. Journal of Alloys and Compounds, 708, 1245-1249. https://doi.org/10.1016/j.jallcom.2017.03.067