Temperature and Composition-Induced Structural Transitions in Bi1-xLa (Pr)(x)FeO3 Ceramics


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.



subject category

Materials Science


Karpinsky, DV; Troyanchuk, IO; Tovar, M; Sikolenko, V; Efimov, V; Efimova, E; Shur, VY; Kholkin, AL

our authors


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

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".