Abstract
The Ruderman–Kittel–Kasuya–Yosida exchange interaction (RKKY) is semi-empirically studied for the first time in compounds of binary REM – Al systems (REM – rare-earth metals: Gd, Dy, Ho, Er) using experimental values of paramagnetic Curie point (θр) of these compounds. Prediction of the RKKY theory was confirmed, i.e. there is a direct proportional dependence of θр value on de Gennes factor for equiatomic compounds of heavy REM with aluminum, just as in the case of pure REM. Values of the indirect exchange interaction parameter were semi-empirically estimated for the studied compounds. In general, it was established that RKKY-type exchange interaction is typical for REM compounds with aluminum, just as for pure REM.
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