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Diffusion of Anisotropic Point Defects in Cubic Crystals in the Presence of a Field of Force
Author(s) -
Kronmüller H.,
Frank W.,
Hornung W.
Publication year - 1971
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.2220460114
Subject(s) - saddle point , condensed matter physics , tetragonal crystal system , crystallographic defect , anisotropy , lattice (music) , diffusion , diffusion equation , lattice diffusion coefficient , symmetry (geometry) , point (geometry) , saddle , physics , field (mathematics) , materials science , classical mechanics , geometry , quantum mechanics , effective diffusion coefficient , mathematics , medicine , mathematical optimization , economy , service (business) , acoustics , magnetic resonance imaging , pure mathematics , economics , radiology , phase (matter)
The diffusion equation for the migration of low‐symmetry point defects in the presence of a field of force has been derived. The discreteness of the lattice and the capability of reorientation of the symmetry axes of the defects were taken into account. An essential point of this description is that different interaction energies in the equilibrium and the saddle‐point configurations could be accounted for. The equations for the diffusion of tetragonal and crowdion interstitials in cubic crystals are presented.