Abstract
Measurements of magnetization and susceptibility were carried out in the temperature range 4.2-300 K on Fe 100- x (17 ⩽ x ⩽ 72.5) and Co 100- x Sm x (50 ⩽ x ⩽ 70) amorphous alloys prepared by liquid-quenching technique. A field-cooling effect was observed at lower temperatures. The anomalous phenomena such as the field-cooling effect and shoulder appearing in the ac susceptibility vs. temperature curves seem to be associated with the mixing of the higher multiplet levels into the ground multiplet of Sm 3+ which is induced by the electrostatic field present in the amorphous solids. In the paramagnetic regime for the Co-Sm alloys, the temperature dependence of susceptibility is similar to that of the Van Vleck Sm 3+ ion, not obeying the Curie-Weiss law.
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