Invention Grant

Fuel cell system
Abstract:
A permanent magnet is expressed by a composition formula: RpFeqMrCusCo100-p-q-r-s. M is at least one element selected from the group consisting of Zr, Ti, and Hf. The magnet includes a crystal grain having a main phase including a TbCu7 crystal phase, and a volume ratio of the TbCu7 crystal phase to the main phase is 95% or more.
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