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From measurements of the magnetic properties of some dilute CuMn alloys we have determined the strength of the Ruderman-Kittel-Kasuya-Yosida interaction, V(r)=(V₀cos2kFr)r³, to be V₀=7.5×10^-37 erg cm³. The corresponding value of the s-d exchange parameter is $|J|=2.2$ eV.
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F. W. Smith (1976) studied this question.
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