MAGNETIC-BEHAVIOR AND HYPERFINE INTERACTIONS IN AL-FE-CE METALLIC GLASSES

Fe-57 Mossbauer effect and magnetic susceptibility measurements have b een performed on the new glassy alloys Al90Fe5Ce5, Al87Fe6.7C6.3, Al87 Fe8.7Ce4.3, and Al87Fe9.3Ce3.7. It is found that Fe atoms are not magn etically ordered in the Fe-rich glasses down to 4.2 K. The disorder in herent to glasses is manifested in the distribution of the electric qu adrupole splittings, which is shown to be well described by a Gaussian shape. The magnetic susceptibility of the alloys follows the Curie-We iss law between 4.2 K and room temperature. The small effective magnet ic moment values suggest mixed-valence behaviour.