Single step electrosynthesis of NiMnGa alloys

Berna Özkale, Fajer Mushtaq, Jordina Fornell, George Chatzipirpiridis, Lukas H.J. Martin, Jordi Sort, Carlos M. Müller, Eva Pellicer, Bradley J. Nelson, Salvador Pané

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

© 2016 Elsevier Ltd. All rights reserved. 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.
Original languageEnglish
Pages (from-to)199-205
JournalElectrochimica Acta
Volume204
DOIs
Publication statusPublished - 20 Jun 2016

Keywords

  • NiMnGa
  • aqueous electrolyte
  • single step electrodeposition
  • thin films

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