DEPTH PROFILING OF THE MAGNETIC HYPERFINE FIELD IN ULTRATHIN FILMS OF Fe USING MÖSSBAUER SPECTROSCOPY A.H. Owens, C.L. Chien et J.C. Walker J. Phys. Colloques, 40 C2 (1979) C2-74-C2-75 DOI: 10.1051/jphyscol:1979225