Abstract
The interaction between paramagnetic impurities in easy plane type antiferromagnets at finite temperatures is considered. In the framework of the diagram spin-operator technique the spin-spin relaxation rate Γ of paramagnetic impurities is investigated. It is shown that Γ depends strongly on the location of a local mode frequency in a spin wave band and on the impurity concentration. In the high temperature region Γ does not depend on temperature in the range c《c ∗ while in the range c≳c ∗Γ is temperature dependent: Γ∼⊤ 1 3 .
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