fig3

Figure 3. Magnetic hysteresis of Ni₅₄Mn₄₆ after oxidation. (A) M(B) loops measured at 326 K for samples oxidized at 650 K for different durations; (B) M(B) loops measured after mechanical polishing; (C) Comparison of the M(B) loop of the sample oxidized at 650 K for 2.8 h, the corresponding polished state, and the background-subtracted ferromagnetic contribution; (D) Temperature-dependent magnetization measured from 300 to 900 K under 1,000 mT.