Effect of oxygen deficit and nonuniform distribution of technological impurities on the dielectric properties of Y{sub 3}Fe{sub 5}O{sub 12} crystals

The experimental and calculated values of the optical permittivity {epsilon}{sub {infinity}} have been analyzed and generalized with allowance for the oxygen concentration and possible valences of Fe and O ions in YIG single crystals. It is shown that the deficit of oxygen ions in the samples is acc...

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Veröffentlicht in:Crystallography reports 2008-03, Vol.53 (2)
Hauptverfasser: Lomako, I. D., Danil'kevich, M. I., Karpinskii, D. V., Makoed, I. I.
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Sprache:eng
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Zusammenfassung:The experimental and calculated values of the optical permittivity {epsilon}{sub {infinity}} have been analyzed and generalized with allowance for the oxygen concentration and possible valences of Fe and O ions in YIG single crystals. It is shown that the deficit of oxygen ions in the samples is accompanied by a decrease in {epsilon}{sub {infinity}}. A decrease in the gradient of distribution of Ba ions over the sample thickness decreases the difference between the calculated and experimental values. It is revealed that the ratio of the number of valence electrons to the number of core electrons, with regard to their polarizabilities, is proportional to the ratio of the incoherent and coherent X-ray scattering intensities, nk/k.
ISSN:1063-7745
1562-689X
DOI:10.1007/S11445-008-2017-Z