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EPR Investigation of the Internal Electric Field in Copper‐Doped Rochelle Salt
Author(s) -
Völkel G.,
Windsch 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.2220430127
Subject(s) - electron paramagnetic resonance , copper , ferroelectricity , electric field , superposition principle , polarization (electrochemistry) , condensed matter physics , spectral line , doping , materials science , induced polarization , nuclear magnetic resonance , chemistry , physics , electrical resistivity and conductivity , optoelectronics , dielectric , quantum mechanics , metallurgy
The EPR spectra of copper doped ferroelectric Rochelle salt and their change due to the ferroelectric polarization are studied. The spectra are described by a model using ligand field theory. The influence of the ferroelectric polarization on the EPR spectra can be explained by the formalism of the linear electric field effect. The measured g ‐factor shifts at a polarization P = ±9 × 10 −8 C cm −2 give a tilting of the copper complex around the y ‐ and z‐complex axes by λ = ± 0.15° and ψ = ±0.23° respectively. One can conclude that the local electric field acting on the copper complex results from a superposition of effects of more than one unit cell.
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