Abstract
Electrodeposition of SmCo alloys from an aqueous solutions has been studied at various current densities, temperatures and bath compositions. Magnetic properties, such as both parallel and perpendicular coercivities, and magnetic saturation, have been measured. Higher bath temperatures lead to metallic deposits at higher current densities resulting in larger deposit Sm content. 33 at% Sm have been obtained at 500 mA/cm2 from bath temperatures of 60oC. The absence of the conducting salt (NH4 sulfamate) leads to higher deposit Sm content. XRD of these deposits shows the presence of Sm2Co17 (200) and SmCo5 (201) phases. Current efficiencies were below 20%. Magnetic saturation of SmCo electrodeposits were close to those obtained by sputtering. Heat treatment of the deposits should increase the perpendicular coercivities to the 2-10 kOe range.
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