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Evolution of a Magnetoresonance Line Near to a Limit of Percolation in Dilute Magnetics
Authors:A M Zabolotskiy
Affiliation:1. Math and Physics Department, Belgorod State Agricultural Academy, I. Vavilov St., Maysky, Belgorod, Russia
Abstract:In paper the results of numerical modeling of a magnetic resonance in dilute magnetics near to a threshold of a percolation are discussed. The classical equation of motion of magnetic moments is used in view of an exchange interaction such as RKKI and imitation of spin-phonon interaction by Monte-Carlo method. It is shown, that cluster structure of a magnetic and threshold of percolation are determined by critical distance, on which there is a change of a sign of an exchange interaction. In an examination of percolation phase transition the jump change of breadth of a line of a magnetic resonance is set, that can form the basis for experimental definition of a threshold percolation and parameters of an exchange interaction by methods of a radiospectroscopy.
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