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EPR Line Critical Broadening Asymmetry and Shape Peculiarities Due to Dipole‐Dipole Electric Interaction in Ferroelectrics
Author(s) -
Vikhnin V. S.,
Borkovskaya Yu. B.
Publication year - 1982
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.2221100243
Subject(s) - dipole , asymmetry , electric dipole transition , condensed matter physics , electric field , electron paramagnetic resonance , line (geometry) , physics , relaxation (psychology) , phonon , soft modes , magnetic dipole , electric dipole moment , spin (aerodynamics) , nuclear magnetic resonance , ferroelectricity , dielectric , quantum mechanics , psychology , social psychology , geometry , mathematics , thermodynamics
The effect of the electric dipole‐dipole interaction by the soft optical phonon field on the EPR line shape in ferroelectrics is studied by means of the line shape statistical theory. The critical dependence of the EPR line broadening and asymmetry is examined. The EPR line shape critical broadening and asymmetry are shown to depend on the soft optical phonon damping. Two mechanisms of the EPR line broadening are considered: i) the dipole electric fields and ii) the spin‐spin cross‐relaxation caused by the electric dipole‐dipole interaction in “soft” matrices. New critical dependences are discovered.