Abstract
In this work magnetic susceptibility of Al91-xCo9Cex (1<x<11 at.%) and Al91-xCoxCe7 (1<x<11 at.%) alloys was investigated by Faraday's method in the wide temperature (T=300-2000 K) and field (B=0.6-1.2 T) ranges. The abnormal behavior of susceptibility above melting point of Al2R compound is discovered. The magnetic susceptibility vs concentration curves for quasybinary systems Al-Ce (XCo = 9 at.%) and Al-Co (XCe = 7 at.%) were plotted. It was found that χ=f(Ce) dependences have oscillating form similar both in solid and liquid states; while for χ=f(Co) susceptibility practically does not depend on Co content. Some parameters of electron structure in Al-Co-Ce alloys are calculated from experimental results. The effective magnetic moment per cerium atom was found to be at a level of 1.1 μB and does not depend on alloy composition, while cobalt atoms exist in non-magnetic state in these alloys. The existence of Al2R quasimoleculars is highly probable in these alloys and their destruction starts only near melting point of Al2R compound.
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