Figure 1: Magnetization temperature dependence.

(a) M−T curves for the solution-treated and the aged Fe₇₃Ga₂₇, Terfenol-D (Tb_0.3Dy_0.7Fe₂), Nd–Fe–B and Fe–Co–V commercial magnets. (b) M–T curves for another proof-of-principal reference, Fe₇₄Ga₂₆ subjected to the same heat treatments with Fe₇₃Ga₂₇. The abbreviated S.T. denotes solution-treated, while F. means ferromagnetic and P. means paramagnetic. (c) Relative magnetization as a function of relative temperature for the M−T curves in a. (d) Normalized M−T curves for Fe, Co and Ni metals (scattered symbols) and calculation using the Brillouin function with J=1/2 (black curve; redrawn from ref. 7).