HoCo4B

HoCo4B is a hard magnetic intermetallic compound based on holmium and cobalt with boron, belonging to the rare-earth transition-metal family of permanent magnets. This material is primarily of research interest for high-performance magnetic applications requiring exceptional coercivity and energy product, though it remains less commercialized than established rare-earth magnets like NdFeB. Engineers would consider HoCo4B when designing advanced magnetic systems that demand superior performance at elevated temperatures or in specialized aerospace and defense applications where conventional permanent magnets reach their limits.