resumo
Bi1-xPrxFeO3 ceramics of the compositions across the rhombohedral-orthorhombic phase boundary have been studied by X-ray diffraction and piezoresponse force microscopy. Charge density calculations and transport properties measurements have also been performed. Piezoresponse force microscopy measurements revealed a considerable increase of the piezoresponse signal for the x = 0.125 compound with dominant polar rhombohedral phase and minor amount of antipolar orthorhombic phase. Electron density distribution study testified significant increase of covalency of this compound as compared with gradual delocalization of electronic wave functions observed for other Bi1-xPrxFeO3 compounds with higher praseodymium content. Alteration of charge distribution character has been confirmed by resistivity measurements. (C) 2015 Elsevier B.V. All rights reserved.
palavras-chave
EARTH-SUBSTITUTED BIFEO3; MAGNETIC-PROPERTIES; PIEZOELECTRIC PROPERTIES; POWDER DIFFRACTION; CRYSTAL-STRUCTURE; TRANSITIONS; CERAMICS; MULTIFERROICS; COEXISTENCE; POLAR
categoria
Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
autores
Karpinsky, DV; Troyanchuk, IO; Pushkarev, NV; Dziaugys, A; Sikolenko, V; Efimov, V; Kholkin, AL
nossos autores
Andrei Kholkin
Investigador Jubilado
Dzmitry Karpinski (Karpinsky)
Bolseiro de pós-Doutoramentoagradecimentos
The authors would like to acknowledge the financial support from the FCT (Grants # SFRH/BPD/42506/2007 and EXPL/CTM-NAN/1611/2013) and BRFFI (Grant # F014D-001). The work in CICECO is partly supported by the FCT grant Pest-/CTM/LA0011/2013.