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Multifrequency spectroscopy of defects in complex oxides
Author(s) -
Malovichko G.,
Grachev V.,
Schirmer O. F.
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200460125
Subject(s) - spectroscopy , wavelength , spectral line , lattice (music) , ion , lithium niobate , low resolution , computational physics , materials science , molecular physics , optics , high resolution , chemical physics , chemistry , physics , optoelectronics , acoustics , geology , remote sensing , quantum mechanics
The typical output of the one‐frequency methods is an image with a space resolution of the order of the used wavelength. Such images contain direct evidence about the space structure of a lattice or macroscopic defects; however, they are not very helpful for the study of the internal structure of the atomic‐size defects. Measurements which use sweeping of electromagnetic wave frequency or sweeping of an external parameter furnish spectra or dependencies of measured characteristics on the swept quantity. The spectra contain indispensable information about energetic characteristics of interactions of intrinsic and extrinsic defects with the lattice ions. Different frequencies in very wide region have to be used for the study of these interactions (multifrequency spectroscopy). An application of this new approach to defects in lithium niobate allowed to determine characteristics of various interactions with magnitudes from 10 4 to 10 16 Hz, and to correlate them with definite models of the defects. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)