The Fe-Au Interface: Hyperfine Interactions of Fe-57 by Mossbauer Transmission and Conversion Electron Spectroscopy

Abstract

We studied the effect of interfaces character in Fe-57/Au thin layers on iron hyperfine parameters using Mossbauer spectroscopy. Four samples of bilayers (Fe-57 covered by Au) were prepared on MgO substrate by pulsed laser deposition (PLD) with varying 57Fe layer thickness (similar to 10-95 nm), covered by Au layer with constant thickness of similar to 8.7 nm.

Mossbauer spectra were acquired in transmission and conversion electron geometry. The hyperfine parameters of alpha-Fe layer, Fe/Au and MgO/Fe interfaces were determined.

Keywords

• iron-gold alloys
• iron-gold interface
• MgO-Fe interface
• thin layer
• Hyperfine Interactions
• Mossbauer spectroscopy
• pulsed laser deposition
• CEMS