Magnetic Moments' Arrangement in Fe Layers Deposited from Acetone Based Electrolyte

Abstract

The acetone based electrolyte was used for electrodeposition of iron layers on the copper substrate. Two types of surfaces of the deposited layer can be obtained: shiny or black. Magnetic properties of the near-surface regions were studied by the conversion electron Mössbauer spectroscopy. The conversion electron Mössbauer spectra revealed apparent dependence of magnetic moments' arrangement on the deposition time. Those results were compared with the magnetization measurements. Composition of black coating was examined by the X-ray photoelectron spectroscopy measurements.

X-ray Absorption near Edge Structure and Extended X-ray Absorption Fine Structure Analysis of Fe(II) Aqueous and Acetone Solutions

“…The electrodeposition process from acetone based solution stops at a thickness of a few hundred nanometers. 7 Additionally, M€ ossbauer measurements of the obtained iron layers show that the magnetic moments have small preferential orientation, perpendicular to the sample plane, a result rather unexpected in the case of layers as thick as few hundred nanometers. Also, when the concentration of water in acetone based electrolyte is too small, the electroplating of metal layer is not possible.…”

“…Recently, electroplating of shiny layers from a new type of electrolyte consisting mainly of acetone was developed. , Under the same dc current conditions we can obtain shiny layers of Fe, Co, Ni, Cu, and Zn well connected to the substrate. The electrodeposition process from acetone based solution stops at a thickness of a few hundred nanometers . Additionally, Mössbauer measurements of the obtained iron layers show that the magnetic moments have small preferential orientation, perpendicular to the sample plane, a result rather unexpected in the case of layers as thick as few hundred nanometers.…”

Structure of Iron Ions in Some Acetone Based Electrolytes

“…1−3 Recently, the new acetone based electrolyte for metal layer electroplating was developed. 4,5 Extended X-ray absorption fine structure (EXAFS) analysis combined with ab initio X-ray absorption near edge (XANES) structure calculations was successfully applied to solve the local structure of iron ions in water and acetone solutions at a certain concentration range. In the case of solutions rich in acetone, the experimental data were reproduced assuming that the majority of iron ions form complexes with tetrahedral Cl − arrangement and the rest octahedral Fe(H 2 O) 6 2+ .…”