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Mechanical and electrical properties of low temperature phase MnBi

TitleMechanical and electrical properties of low temperature phase MnBi
Publication TypeJournal Article
Year of Publication2016
AuthorsJiang, XJ, Roosendaal, T, Lu, XC, Palasyuk, O, Dennis, KW, Dahl, M, Choi, JP, Polikarpov, E, Marinescu, M, Cui, J
JournalJournal of Applied Physics
Volume119
Pagination033903
Date Published01
Type of ArticleArticle
ISBN Number0021-8979
Accession NumberWOS:000369287900008
Keywordsmagnetic-properties, physical-properties
Abstract

ation on the mechanical and electrical properties of bulk LTP MnBi and their temperature dependence. A MnBi ingot was prepared using an arc melting technique and subsequently underwent grinding, sieving, heat treatment, and cryomilling. The resultant powders with a particle size of similar to 5 mu m were magnetically aligned, cold pressed, and sintered at a predefined temperature. Micro-hardness testing was performed on a part of original ingot and we found that the hardness of MnBi was 109 +/- 15 HV. The sintered magnets were subjected to compressive testing at different temperatures and it was observed that a sintered MnBi magnet fractured when the compressive stress exceeded 193 MPa at room temperature. Impedance spectra were obtained using electrochemical impedance spectroscopy at various temperatures and we found that the electrical resistance of MnBi at room temperature was about 6.85 mu Omega m. (c) 2016 AIP Publishing LLC.

DOI10.1063/1.4939811
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