Single step electrosynthesis of NiMnGa alloys. (20th June 2016)

• Record Type: Journal Article
• Authors: Özkale, Berna; Mushtaq, Fajer; Fornell, Jordina; Chatzipirpiridis, George; Martin, Lukas H.J.; Sort, Jordi; Müller, Carlos M.; Pellicer, Eva; Nelson, Bradley J.; Pané, Salvador
• Is Part Of: Electrochimica acta. Volume 204(2016)
• Page Start: 199
• Page End: 205
• Publication Date: 2016-06-20
• Subjects: NiMnGa -- single step electrodeposition -- aqueous electrolyte -- thin films; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.04.071
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: An electrochemical synthesis route for NiMnGa alloys is presented. Thin films of NiMnGa were fabricated by single step electrodeposition from aqueous electrolytes using direct current over a range of current densities. By electrolyte tuning, homogeneous films with high Ga and Mn content could be achieved at current densities as high as −400 mA cm −2 . Detailed compositional analysis of the alloys showed that growth was homogeneous and oxygen content was minimized. Films plated at very low current densities were found to be nanocrystalline/amorphous. In order to obtain fully crystalline samples, thermal annealing was carried out. Mechanical characterization was assessed by nanoindentation, and the effect of Ga content on mechanical properties was investigated.