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Processing of MnBi bulk magnets with enhanced energy product

TitleProcessing of MnBi bulk magnets with enhanced energy product
Publication TypeJournal Article
Year of Publication2016
AuthorsPoudyal, N, Liu, XB, Wang, W, Nguyen, VV, Ma, YL, Gandha, K, Elkins, K, Liu, JP, Sun, KW, Kramer, MJ, Cui, J
JournalAip Advances
Volume6
Pagination056004
Date Published05
Type of ArticleArticle; Proceedings Paper
ISBN Number2158-3226
Accession NumberWOS:000377962500173
Keywordscompound, crystal-structure, electronic-structure, Materials Science, physics, Technology - Other Topics
Abstract

We report magnetic properties and microstructure of high energy-product MnBi bulk magnets fabricated by low-temperature ball-milling and warm compaction technique. A maximum energy product (BH)(max) of 8.4 MGOe and a coercivity of 6.2 kOe were obtained in the bulk MnBi magnet at room temperature. Magnetic characterization at elevated temperatures showed an increase in coercivity to 16.2 kOe while (BH)(max) value decreased to 6.8 MGOe at 400 K. Microstructure characterization revealed that the bulk magnets consist of oriented uniform nanoscale grains with average size about 50 nm. (C) 2016 Author(s).

DOI10.1063/1.4942955
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Alternate JournalAIP Adv.