Prioteasa, P; Codescu, MM; Patroi, E; Patroi, D; Marinescu, V
In the present study, the results of preliminary experiments about electrodeposition in magnetic field of cobalt nickel manganese-phosphorus (CoNiMnP) alloy films on copper substrate are reported. The composition of electrolyte bath was: 26 g/L CoCl2 center dot 6H(2)O, 24 g/L NiCl2 center dot 6H(2)O, 3.6 g/L MnSO4, 24 g/L H3BO3, 4.6 g/L NaH2PO2, 23 g/L NaCl, 0.8 g/L saccharin, 0.2 g/L sodium lauryl sulphate and 0.01 g/L cerium(III) sulphate. The electrodeposition experiments were conducted in the following operating conditions: 3.5-5 pH value, 2-9 mA/cm(2) current density, 2-5 V voltage, room temperature (25 degrees C), magnetic stirring, and 1-15 h electrolysis time. The electrolysis cell was surrounded with a permanent magnet. The CoNiMnP alloy layers showed good appearance and were characterized by uniformity, fine-grained and brightness. The best quality CoNiMnP alloy was a smooth, bright and uniform deposit having about 70 pm thickness, which was obtained working with 5 mA/cm(2) current density during 15 h. The structure, texture, crystallite size and Vickers microhardness were evidenced and measured by SEM and XRD investigations and microhardness tests, respectively. Also, the magnetic characteristics of CoNiMnP films were studied using magnetometry.