Author:

Keywords:

giant magnetoresistance, aluminum, iron, Science & Technology, Physical Sciences, Physics, Applied, Physics, GIANT MAGNETORESISTANCE, ALUMINUM, IRON, 02 Physical Sciences, 09 Engineering, Applied Physics, 40 Engineering, 51 Physical sciences

Abstract:

In the present study we aim to investigate the onset of Co cluster formation in Ag by Mossbauer spectroscopy. Hyperfine interaction techniques are very powerful in determining the onset of formation of very small clusters because they probe the atomic environment present at the radioactive probe atom's site. We employed different sample preparation techniques and discuss the differences between them. We could establish the proper conditions for obtaining a large fraction of Co dimers. The behaviour of the different components in the Mossbauer spectra as a function of the Co concentration allows us to estimate the typical trapping radius for Co dimer formation.