1977 Volume 43 Issue 2 Pages 490-493
Reversible permeability of α-Iron containing nitrogen was measured in a weak bias field up to 2 Oe. A discontinuous increase of reversible permeability of a single crystal took place at a critical bias field owing to a stabilization effect of nitrogen atoms. This fact was explained in terms of the theory of the magnetic after effect proposed by Néel and the anisotropy energy coefficient ω was estimated from this measurement to be 2.6×10−16 erg per atom.
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