Metastable perovskite Bi1-xLaxFe0.5Sc0.5O3 phases in the range of the compositional crossover

Perovskite ceramics of the Bi 1- x La x Fe 0.5 Sc 0.5 O 3 composition (0.30 ≤ x ≤ 0.35) that cannot be sintered in bulk form as a single phase using the conventional ceramic route were successfully prepared using the high-pressure/high-temperature technique. It has been shown that the room-temperatu...

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Published inPhase transitions Vol. 90; no. 9; pp. 831 - 839
Main Authors Salak, A. N., Khalyavin, D. D., Zamaraite, I., Stanulis, A., Kareiva, A., Shilin, A. D., Rubanik, V. V., Radyush, Yu. V., Pushkarev, A. V., Olekhnovich, N. M., Starykevich, M., Grigalaitis, R., Ivanov, M., Banys, J.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 02.09.2017
Taylor & Francis Ltd
Subjects
Ceramics
high-pressure synthesis
metastable phase
Multiferroic
Perovskites
Phase composition
Sintering
sol-gel method
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Summary:Perovskite ceramics of the Bi 1- x La x Fe 0.5 Sc 0.5 O 3 composition (0.30 ≤ x ≤ 0.35) that cannot be sintered in bulk form as a single phase using the conventional ceramic route were successfully prepared using the high-pressure/high-temperature technique. It has been shown that the room-temperature compositional crossover from the antipolar phase whose incommensurate modulation of displacements of Bi/La and oxygen is described by the Imma(00γ)s00 superspace group to the non-polar Pnma phase occurs in the narrow range between x = 0.33 and x = 0.34 with no phase coexistence. The features of this compositional crossover are discussed in comparison with that observed in the Bi 1- x La x FeO 3 system.
ISSN:0141-1594
1029-0338
DOI:10.1080/01411594.2017.1290802