Enhancement of anisotropy energy of SmCo₅ by ceasing the coupling at 2c sites in the crystal lattice with Cu substitution.

ABSTRACT: SmCo₅ and SmCo_5-xCu_x magnetic particles were produced by co-precipitation followed by reduction diffusion. HRTEM confirmed the Cu substitution in the SmCo₅ lattice. Non-magnetic Cu was substituted at "2c" site in the SmCo₅ crystal lattice and effectively stopped the coupling in its surroundings. This decoupling effect decreased magnetic moment from SmCo₅ (12.86 μ_B) to SmCo₄Cu (10.58 μ_B) and SmCo₃Cu₂ (7.79 μ_B) and enhanced anisotropy energy from SmCo₅ (10.87 Mega erg/cm³) to SmCo₄Cu (14.05 Mega erg/cm³) and SmCo₃Cu₂ (14.78 Mega erg/cm³). Enhancement of the anisotropy energy increased the coercivity as its values for SmCo₅, SmCo₄Cu and SmCo₃Cu₂ were recorded as 4.5, 5.97 and 6.99 kOe respectively. Being six times cheaper as compared to Co, substituted Cu reduced the price of SmCo₃Cu₂ up to 2%. Extra 15% Co was added which not only enhanced the M_r value but also reduced the 5% of the total cost because of additional weight added to the SmCo₃Cu₂. Method reported in this work is most energy efficient method on the synthesis of Sm-Co-Cu ternary alloys until now.

SUBMITTER: Haider SK 

PROVIDER: S-EPMC8115628 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature