Role of Hydrogen Evolution during Epitaxial Electrodeposition of Fe on GaAs. Issue 4 (20th December 2017)

• Record Type: Journal Article
• Authors: Leistner, Karin; Duschek, Kenny; Zehner, Jonas; Yang, Mingze; Petr, Andreas; Nielsch, Kornelius; Kavanagh, Karen L.
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 4(2018)
• Page Start: H3076
• Page End: H3079
• Publication Date: 2017-12-20
• Subjects: electrodeposition -- GaAs -- hydrogen evolution; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0071804jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : The electrode reactions during the initial stages of Fe electrodeposition on GaAs from a sulfate-based aqueous electrolyte, were investigated. Electrochemical quartz microbalance measurements were carried out to distinguish hydrogen evolution from Fe deposition. For conditions with a lower hydrogen evolution rate, hemispherical Fe nanoparticles with negligible in-plane magnetic anisotropy are obtained. In contrast, when hydrogen evolution dominates over Fe electrodeposition, the deposited nanoparticles exhibit a defined faceted shape, crystallographic alignment and magnetic in-plane anisotropy. This beneficial impact of hydrogen evolution on the epitaxy is discussed with regard to the role of hydrogen adsorption during Fe/GaAs interface formation.