Magnetic properties of single crystal Nd1-xSmxCo5alloys

The magnetic properties of the pseudo-binary alloy system Nd1-xSmxCo5were investigated to determine the compositional dependence of the anisotropy constants and the saturation magnetization. The anisotropy constants K1and K2of the alloy system were not linearly dependent on composition, suggesting that the single-ion model of anisotropy is not applicable for this System. The deviation from linear behavior could be fitted to an equation from sub-regular solution theory, giving K1=-67×10⁷+96×10⁷x+6×10⁷x²(1-x)+ 108×10⁷x(1-x)²ergs/cm³and K1=35×10⁷-35×10⁷x+43×10⁷x²(1-x)-104×10⁷x(1-x)²ergs/cm³at 4.2°K. However, the magnetization was found to be linearly dependent on composition in this system and is given by Ms(0)=1122-145.9x emu/cm³.