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Identification of a secondary phase Ga 2 O 3 (ZnO) m in Ga‐doped ZnO thermoelectric materials by a (3 + 1)‐dimensional superspace model
Author(s) -
Michiue Yuichi,
Mori Takao
Publication year - 2018
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576718004119
Subject(s) - superspace , wurtzite crystal structure , thermoelectric effect , doping , crystallography , materials science , phase (matter) , diffraction , homologous series , thermoelectric materials , physics , condensed matter physics , chemistry , mathematical physics , supersymmetry , thermodynamics , quantum mechanics
A unified structure model for the homologous compounds Ga 2 O 3 (ZnO) m in (3 + 1)‐dimensional superspace was modified by refinements for samples of Ga 2 O 3 :ZnO = 1: n ( n = 15, 23, 28, 33, 38). The first‐order sine terms in the modulation functions decreased with increasing phase index m . The diffraction intensities of the thermoelectric material Ga 2 O 3 :ZnO = 1:98 were best fitted by a two‐phase model containing the wurtzite structure (Ga‐doped ZnO) and the homologous compound Ga 2 O 3 (ZnO) s , where s = 38.