Spin-density enhancement in a 119Sn implanted (110)Cr single crystal as evidenced by Mössbauer spectroscopy

Magnetic properties of a presurface zone of the bulk, single-crystal (110)Cr, implanted with 119Sn ions were studied by means of conversion electron Mössbauer spectroscopy. A strong enhancement of the magnetic hyperfine field, B, was found. The increase is by a factor of ~2.7 in the average value of B and by a factor of ~2.3 in the most probable value of B (the amplitude of the spin-density waves, SDW's). The observed effects are explained in terms of the interference of two spin-density waves having the same amplitude phase but various polarizations. The relative contributions of the interfering SDW's was estimated as equal to ~60% for those with mutual perpendicular and ~40% for those with mutual parallel polarization.