Temperature and Composition-Induced Structural Transitions in Bi1-xLa (Pr)(x)FeO3 Ceramics / Karpinsky Dmitry V.,Troyanchuk Igor O.,Tovar Michael,Sikolenko Vadim,Efimov Vadim,Efimova Ekaterina,Shur Vladimir Ya,Kholkin Andrei L. // JOURNAL OF THE AMERICAN CERAMIC SOCIETY. - 2014. - V. 97, l. 8. - P. 2631-2638.

ISSN/EISSN:

0002-7820 / 1551-2916

Type:

Article

Abstract:

Bi1-xLaxFeO3 and Bi1-xPrxFeO3 ceramics of the compositions near the morphotropic phase boundary have been studied by X-ray and neutron diffraction techniques and differential thermal analysis. The structural phases characterized by the long-range polar, antipolar, and nonpolar ordering as well as the phase coexistence regions have been identified using the diffraction data depending on the dopant concentration and temperature. As a result of these studies the three phase region has been observed for the Pr-doped compounds and the phase diagrams have been constructed. The detailed evolution of the structural parameters permitted to itemize the factors affecting the structural phase transitions and clarify the origin of the enhanced electromechanical properties in these materials. The performed structural analysis disclosed different character of the chemical bonds in the La-and Pr-doped BiFeO3 compounds. Further, the role of the rare-earth ions in the covalency of the chemical bonds is discussed.

Author keywords:

EARTH-SUBSTITUTED BIFEO3; SOLID-SOLUTIONS; DOPED BIFEO3; NEUTRON-DIFFRACTION; PHASE-TRANSITIONS; CRYSTAL-STRUCTURE; BOUNDARY

DOI:

10.1111/jace.12978

Web of Science ID:

ISI:000340529200051

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG
Publisher	WILEY-BLACKWELL
Address	111 RIVER ST, HOBOKEN 07030-5774, NJ USA
Language	English
EISSN	1551-2916
Keywords-Plus	EARTH-SUBSTITUTED BIFEO3; SOLID-SOLUTIONS; DOPED BIFEO3; NEUTRON-DIFFRACTION; PHASE-TRANSITIONS; CRYSTAL-STRUCTURE; BOUNDARY
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Ceramics
Author-Email	karpinski@ua.pt
ResearcherID-Numbers	Karpinsky, Dmitry/I-3622-2012 Kholkin, Andrei/G-5834-2010 Sikolenko, Vadim/D-3869-2011 Shur, Vladimir/J-9078-2015
ORCID-Numbers	Karpinsky, Dmitry/0000-0002-1046-543X Kholkin, Andrei/0000-0003-3432-7610 Sikolenko, Vadim/0000-0001-5252-6870
Funding-Acknowledgement	FCT {[}SFRH/BPD/42506/2007, EXPL/CTM-NAN/1611/2013, PEst-C/CTM/LA0011/2013]; RFFI {[}13-02-90903]; European Commission {[}283883]
Funding-Text	The authors would like to acknowledge the financial support from the FCT (grants no. SFRH/BPD/42506/2007, EXPL/CTM-NAN/1611/2013, and PEst-C/CTM/LA0011/2013) and from RFFI (grant no. 13-02-90903). This research project has been supported by the European Commission under the 7th Framework Programme through the ``Research Infrastructure{''} action of the ``Capacities{''} Programme, NMI3-II grant number 283883. Drs. M. Wojtas and V. Bystrov are acknowledged for the DTA measurements and helpful discussions, respectively.
Number-of-Cited-References	33
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	43
Journal-ISO	J. Am. Ceram. Soc.
Doc-Delivery-Number	AN4AE