The low temperature phase (LTP) MnBi is a promising rare-earth-free permanent magnet material due to its high intrinsic coercivity and its large positive temperature coefficient. While scientists are making progress on fabricating bulk MnBi magnets, engineers have started to consider MnBi magnet for motor applications. In addition to the magnetic properties, there are other physical properties that could significantly affect a motor design. Here, we report the results of our investigation on the mechanical and electrical properties of bulk LTP MnBi and their dependence on temperature. We found at room temperature the sintered MnBi magnet fractures when the compression stress exceeds 193 MPa; and its room temperature electric resistance is about 6.85 µO-m.
Revised: March 1, 2021 |
Published: January 21, 2016
Citation
Jiang X., T.J. Roosendaal, X. Lu, O. Palasyuk, K.W. Dennis, M.E. Dahl, and J. Choi, et al. 2016.Mechanical and Electrical Properties of Low Temperature Phase MnBi.Journal of Applied Physics 119, no. 3:Article No. 033903.PNNL-SA-111396.doi:10.1063/1.4939811