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Topotaxial Formation of Mg 4 Nb 2 O 9 and MgNb 2 O 6 Thin Films on MgO (001) Single Crystals by Vapor–Solid Reaction
Author(s) -
Sun Duochun,
Senz Stephan,
Hesse Dietrich
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03421.x
Subject(s) - thin film , materials science , crystallography , substrate (aquarium) , solid state , solid solution , analytical chemistry (journal) , chemistry , nanotechnology , metallurgy , oceanography , chromatography , geology
Thin‐film solid‐state reactions in the system MgO–Nb 2 O 5 are experimentally investigated. MgO (001) substrates are subjected to Nb‐O vapor at different temperatures in high vacuum. Thin films containing the phases Mg 4 Nb 2 O 9 and MgNb 2 O 6 are formed by a vapor–solid reaction between the Nb‐O vapor and the substrate. The crystallographic orientations of these phases are studied by X‐ray diffractometry including pole figure analysis. Mg 4 Nb 2 O 9 grows (11.4)‐, (11.6)‐, and (11.9)‐oriented, whereas MgNb 2 O 6 grows with a preferential (241) orientation. The crystallographic relationships and their origins are discussed.