Local environment of Mn2+ and Cr3+ centres in LiNbO3: Discussion of recent endor results

Gábor Corradi, Katalin Polgár, G. Corradi, Hubert Söthe, Johann Martin Spaeth

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Abstract

Recent electron nuclear double resonance (ENDOR) experiments on Mn2+ in LiNbO3 allowed to identify the on-axis Nb neighbours together with several Li shells with one nearest neigh bour Li missing, but failed to resolve the nearest off-axis Nb shell. This failure was attributed to local disorder. We discuss here that the nearby Li vacancy may be filled by a Nb which has relaxed from its normal lattice site, while Mn2+ remains on a Li site. In the case of Cr3+ in heavily Mg-codoped LiNbO3 substitution was shown to be on the Nb site. This assignement and its dependence on Mg is confirmed by a comparison of the 53Cr quadrupole and ESR data in LiNbO3 and AI2O3.

Original languageEnglish
Pages (from-to)295-299
Number of pages5
JournalFerroelectrics
Volume125
Issue number1
DOIs
Publication statusPublished - Jan 1 1992

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Vacancies
Paramagnetic resonance
Substitution reactions
Electrons
quadrupoles
Experiments
disorders
substitutes
electrons
lithium niobate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Local environment of Mn2+ and Cr3+ centres in LiNbO3 : Discussion of recent endor results. / Corradi, Gábor; Polgár, Katalin; Corradi, G.; Söthe, Hubert; Spaeth, Johann Martin.

In: Ferroelectrics, Vol. 125, No. 1, 01.01.1992, p. 295-299.

Research output: Contribution to journalArticle

Corradi, Gábor ; Polgár, Katalin ; Corradi, G. ; Söthe, Hubert ; Spaeth, Johann Martin. / Local environment of Mn2+ and Cr3+ centres in LiNbO3 : Discussion of recent endor results. In: Ferroelectrics. 1992 ; Vol. 125, No. 1. pp. 295-299.
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