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US 2016/0365181 A1Published application
Permanent magnet and rotating machine including the same
AssigneeTDK Corporation
InventorsKenichi SUZUKI, Shogo KADOTA, Eiichiro FUKUCHI
Life of this patent
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Abstract
A permanent magnet having a periodic structure with the concentrations of Fe and T (T is one or more transition metal elements with Co or Ni as necessity) changing alternately, wherein, the concentrations change with a period of 3.3 nm or less and the concentration difference of Fe in the concentration change is 5 at % or more. The permanent magnet has a high saturation magnetization Is and coercivity HcJ and can be prepared even without rare earth element(s) R.
Claims4
A permanent magnet comprising a periodic structure in which the concentrations of Fe and T change alternately,
- wherein, T is one or more transition metal elements with Co or Ni as necessity,
- the concentrations change with a period of 3.3 nm or less, and the concentration difference of Fe in the concentration change is 5 at % or more.
Dependencies are inferred from the claim text.