On the squareness factor behavior of RE-FeB (RE=Nd or Pr) magnets above room temperature
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IEEE Transactions on Magnetics
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The magnetic stability of RE-FeB (RE = Nd or Pr) sintered magnets above room temperature was investigated by monitoring the squareness factor (SF). At 293 les T les 423 K, commercial anisotropic NdFeB-based sintered magnets with a Curie temperature ( T c ) of around 585 K showed no appreciable change in their squareness factors. This indicates that the SF is controlled mainly by the samples' microstructural features. Magnets with T c > 593 K showed a tendency for improved squareness factor at higher temperatures due to the methodology employed to characterize the SF. On the other hand, PrFeCoBCuNb sintered magnets with T c > 593 K presented a reduction in the SF with temperature rising from 298 to 373 K.
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PERIGO, E.A.; TAKIISHI, H.; MOTTA, C.C.; FARIA, R.N. On the squareness factor behavior of RE-FeB (RE=Nd or Pr) magnets above room temperature. IEEE Transactions on Magnetics, v. 45, n. 10, p. 4431-4434, 2009. DOI: 10.1109/TMAG.2009.2025190. Disponível em: http://repositorio.ipen.br/handle/123456789/4843. Acesso em: 30 Dec 2025.
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