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Tuning the orthorhombic–rhombohedral phase transition temperature in sodium potassium niobate by incorporating barium zirconate
Author(s) -
Wang Ruiping,
Bando Hiroshi,
Katsumata Tetsuhiro,
Inaguma Yoshiyuki,
Taniguchi Hiroki,
Itoh Mitsuru
Publication year - 2009
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200903090
Subject(s) - orthorhombic crystal system , rietveld refinement , barium , trigonal crystal system , phase transition , perovskite (structure) , zirconate , phase (matter) , materials science , dielectric , chemistry , potassium , crystallography , mineralogy , inorganic chemistry , crystal structure , condensed matter physics , ceramic , metallurgy , optoelectronics , titanate , physics , organic chemistry
We report that the orthorhombic–rhombohedral phase transition temperature in sodium potassium niobate could be tuned from lower to higher than room temperature by incorporating barium zirconate into it. It is revealed that when barium zirconate is between 8 mol% and 15 mol%, the solid solution exhibits rhombohedral symmetry at room temperature. Rietveld analysis shows that the space group of the rhombohedral phase is R3m. It is suggested that a relatively larger B‐cation favors the low‐temperature phase which is a common phenomenon for perovskite ferroelectrics. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)