Bismanol, a permanent magnet made from powder metallurgy of Manganese Bismuthide, was developed by the US Naval Ordnance Laboratory in the early 1950s - at the time of invention it was one of the highest coercive force permanent magnets available, at 3000 oersteds. Coercive force reached 3650 oersteds and flux density 4800 by the mid 1950s. The material was generally strong, and stable to shock and vibration, but had a tendency to chip. Slow corrosion of the material occurred under normal conditions.
- "Bismanol", Physics Today: 19, August 1952, doi:10.1063/1.3067699
- Adams, E.; Hubbard, W.M. (1953), "BISMANOL PERMANENT MAGNETS, EVALUATION AND PROCESSING", Naval Ordnance Lab., USA
- Adams, Edmond (1953). "A New Permanent Magnet from Powdered Manganese Bismuthide". Rev. Mod. Phys. 25 (1): 306–307. doi:10.1103/RevModPhys.25.306.
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