Bismanol
DOI: 10.1063/1.3067699
A new magnetic material which exhibits a coercive force of 3000 oersteds, the highest recorded coercive force of any known permanent magnetic material, has been developed at the Naval Ordnance Laboratory. Named Bismanol from its composition of bismuth and manganese, and from NOL where it was prepared, the material exceeds any other permanent magnet, except the platinum‐cobalt alloy, in available flux density in short magnets where length to diameter ratio is one or less. Since Bismanol magnets are made by the powder metallurgy technique, complicated shapes can be processed to close tolerances without requiring machining.
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