Effect of Ti-Impurities on Ferromagnetic Properties of Fe, Co and Ni

Abstract

Saturation magnetization, Curie temperature, magnetocrystalline anisotropy and magnetostriction were measured for M_1−cTi_c (M=Fe, Co, Ni) systems. The rate of change in saturation magnetic moment dμ⁄dc at 0 K was found to be −6.2 μ_B and −4.3 μ_B per atom in Co–Ti and Ni–Ti systems, respectively. For Fe–Ti system the decrease in magnetic moment was non-linear. Curie temperatures of Ni–Ti system decrease monotonically at the rate of −42 K per atomic percent Ti and those of Fe–Ti system increase linearly at the rate of +3.7 K per atomic percent Ti. Magnetostriction and magnetocrystalline anisotropy of Fe–Ti system also increase with increasing Ti concentration.