Mössbauer spectroscopy in ferromagnetic metal surfaces

Mössbauer experiments were made utilizing Co⁵⁷or Fe⁵⁷as a microprobe for studying the magnetic properties of ferromagnetic metal surfaces. For the emission spectroscopy, carrier-free Co⁵⁷atoms were electrodeposited on a surface of bulk iron. The absorption spectroscopy was applied to a sample whose surface was selectively enriched with Fe⁵⁷. In both cases, the spectra at 4.2 K showed that all iron atoms in the surface are ferromagnetic, but the reduced hyperfine field suggests a partial decrease of the local magnetic moment.