Mössbauer sidebands from a single parent line

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Abstract
Mössbauer sidebands from a single parent line have been produced by using a composite sample made of two materials. A nonmagnetic 310 stainless-steel (ss) foil plated with Ni was used as a single-line Mössbauer-effect probe, and the ferromagnetic and magnetostrictive Ni provided the driving force for the production of ultrasound in the sample. The unequivocally measured sideband intensities agree qualitatively with Abragam's sideband theory. However, no existing theory at present can account quantitatively for the sideband intensities. Sidebands in the Ni-plated 310 ss sample decrease sharply with increasing frequency. No sideband was observed for 310 ss alone, nor 310 ss plated with Cu or Ag. These results further support the view that the driving mechanism for sidebands is magnetostriction and not eddy currents.