Abstract
A systematic study of solid solutions was undertaken by Mössbauer spectroscopy. The results confirm previous magnetization and neutron diffraction measurements. In the concentration range , in which the compounds are ferromagnetic, large hyperfine fields agree with the Mn and Fe moment values. In contrast, smaller average fields are measured at low temperature in the antiferromagnetic state from broadened Mössbauer spectra. The latter results are consistent both with the reduced value of the Fe moment and with the non-collinearity of the Fe and Mn moments. The magneto-elastic ferromagnetic antiferromagnetic transition has been clearly demonstrated for x = 0.275 and x = 0.30.
Published Version
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