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Diffusion in Crystals with Competing Interactions of Migrating Ions
Author(s) -
Zubkus V.,
Kundrotas P.,
Lapinskas S.,
Kashcheev V.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221580103
Subject(s) - diffusion , arrhenius equation , ion , cluster (spacecraft) , materials science , lattice (music) , thermodynamics , lattice diffusion coefficient , statistical physics , chemical physics , condensed matter physics , homogeneous , self diffusion , relaxation (psychology) , effective diffusion coefficient , physics , kinetics , classical mechanics , quantum mechanics , medicine , psychology , social psychology , business , self service , radiology , marketing , computer science , acoustics , magnetic resonance imaging , programming language
Transport processes are investigated by means of the lattice gas model with nearest and nextnearest neighbour attractive and repulsive interactions. The temperature and concentration dependences of self‐diffusion coefficient and electroconductivity in the disordered homogeneous phase of these systems are calculated by the cluster approximation. The regions of deviation from the Arrhenius law are determined. The spatial‐time distributions of migrating particles are obtained. The influence of strong short‐range interactions on the relaxation time of the diffusion process is investigated. Several experimental results of diffusion in systems with strong shortrange correlations are discussed by the theory proposed.