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

doi:10.1016/j.jallcom.2017.03.067

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

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

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 language	English
Pages (from-to)	1245-1249
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	708
DOIs	https://doi.org/10.1016/j.jallcom.2017.03.067
Publication status	Published - 2017

Bibliographical note

Funding Information:
This work was supported by the Priority Research Centers Program (2009-0093823) through the National Research Foundation of Korea (NRF). H-S Lee thanks to the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2016-11-1280).

Publisher Copyright:
© 2017

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2017.03.067

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title = "Magnetic properties of large-scaled MnBi bulk magnets",

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.",

author = "Sumin Kim and Hongjae Moon and Hwaebong Jung and Kim, {Su Min} and Lee, {Hyun Sook} and Haein Choi-Yim and Wooyoung Lee",

note = "Funding Information: This work was supported by the Priority Research Centers Program (2009-0093823) through the National Research Foundation of Korea (NRF). H-S Lee thanks to the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2016-11-1280). Publisher Copyright: {\textcopyright} 2017",

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AU - Kim, Sumin

AU - Moon, Hongjae

AU - Jung, Hwaebong

AU - Kim, Su Min

AU - Lee, Hyun Sook

AU - Choi-Yim, Haein

AU - Lee, Wooyoung

N1 - Funding Information: This work was supported by the Priority Research Centers Program (2009-0093823) through the National Research Foundation of Korea (NRF). H-S Lee thanks to the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2016-11-1280). Publisher Copyright: © 2017

PY - 2017

Y1 - 2017

N2 - 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.

AB - 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.

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Magnetic properties of large-scaled MnBi bulk magnets

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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