Magnetic Remanence in Cu(Mn) Alloys

An experimental investigation of the saturated magnetic remanence in dilute Cu(Mn) alloys ranging from 0.47 to 10.0 at.% Mn has been carried out in the temperature range 0.6^∘{} to 40^∘{}K. At low temperatures the remanence has a temperature dependence resembling that of a paramagnetic material in a constant magnetic field H₀. Domain sizes derived from the estimated remanence at 0^∘{}K are larger than expected from the assumption that domain boundaries coincide with nearest neighbor Mn pairs. At higher temperatures the effective magnetic field HT is defined on the basis of the deviation of the remanence from the constant-field curve. For the smaller concentrations the temperature dependence of HTH₀ appears intermediate between [1-(TTc)²]1/2 and [1-(TTc)²]. The ratio H₀Tc is approximately the same for all concentrations.