4.2 From Fig. 4.22, a. What alloy has the highest saturation magnetization? b. What is the numerical value of this magnetization, expressed as magnetization per unit mass? c. How does this compare with the saturation per unit mass of iron? Saturation magnetization H (Bohr magnetons/atom) 3.0 2.5 Theory 20 2.0 1.5 1.0 10 0.5 0 BCC FCC Fe-V + Fe-Cr Fe-Ni(1) Fe-Co O Ni-Co A Ni-Cu Ni-Zn Ni-V Ni-Cr b Ni-Mn Co-Cr 0 Co-Mn D 0 o 50Ni50Co-V 50Ni50Co-Cr_ Fe-Ni(2) Pure metals Cr n = 6 Mn 7 Fe 8 Co 9 Ni Cu 10 11 Fig. 4.22 Slater-Pauling curve: dependence of saturation magnetization of alloys on the number of (3d+4s) electrons per atom. [S. Chikazumi, Physics of Ferromagnetism, Oxford University Press, (1997).]