The influence of an interface electric field on the distribution coefficient of chromium in LiNbO3

Satoshi Uda, William A. Tiller

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

The effective solute partitioning of chromium was investigated on single crystals of LiNbO3 grown by the laser-heated pedestal growth (LHPG) technique. Electric field effects at the interface influence this solute partitioning, leading to an electric field-dependent effective solute distribution coefficient, kE. The LHPG technique made it possible to explore these field effects by controllably changing the growth velocity (V) and the temperature gradient (GS, GL) near the interface over a wide range. The electric field generated via the temperature gradient is associated with the thermoelectric power while an additional electric field is growth rate associated via a charge separation effect. By applying the Burton-Prim-Slichter (BPS) theory to our experimental data, we found the phase diagram solute partition coefficient to be k0 ≈ 3.65, while the field-influenced solute partition coefficient (V = 0) was k′EO ≈ 8.17 at GL ≈ 11500°C/cm. It is theoretically shown that the same considerations can be applied to all ionic partitioning at a solid-liquid interface.

Original languageEnglish
Pages (from-to)93-110
Number of pages18
JournalJournal of Crystal Growth
Volume121
Issue number1-2
DOIs
Publication statusPublished - 1992 Jun
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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