Bismanol is an alloy of Bismuth, Manganese and Iron developed by the US Naval Ordnance Laboratory. It was used to make permanent magnets for use in small electric motors.[1]
Bismanol magnets have been replaced by Neodymium magnets which are both cheaper and superior in other ways, Samarium-Cobalt magnets in more critical applications, and Alnico magnets.
Around 50 years ago, maybe more, the US Naval Ordnance Laboratory developed a permanent magnetic alloy called "Bismanol" which is a Bismuth-Manganese-Iron alloy. Bismanol has very high coercive force and moderate energy density, making it a good choice for small electric motors.
Currently Bismuth isn't for magnetic alloys.