Enhancement of resistivity and magnetization of Bi1-xLaxFe1-yMnyO3 ceramics by composition optimization
authors Carvalho, TT; Manjunath, B; de la Cruz, JP; Amaral, VS; Fernandes, JRA; Almeida, A; Moreira, JA; Vilarinho, R; Tavares, PB
nationality International
journal JOURNAL OF ALLOYS AND COMPOUNDS
author keywords BiFeO3; Chemical co-substitution; Incommensurate modulated structure; Leakage currents; Magnetic measurements; Multiferroic
keywords MORPHOTROPIC PHASE-BOUNDARY; DOPED BIFEO3 CERAMICS; MULTIFERROIC PROPERTIES; PIEZOELECTRIC PROPERTIES; THERMODYNAMIC STABILITY; ROOM-TEMPERATURE; LA; TRANSITION; SYSTEM; DIAGRAM
abstract This work aims at studying the effect of La and Mn substituents on the structural, electrical and magnetic properties of Bi1-xLaxFe1-yMnyO3 (0 <= x <= 0.30; 0 <= y <= 0.20) at room temperature, in order to find out the optimal compositions that provide both high resistivity and remnant magnetization. The analysis of the XRD patterns and Raman spectra suggest a progressive transition from a rhombohedral for x < 0.15 with y = 0, and x = 0 with y <= 0.20 to an orthorhombic structure for x + y>0.20. Moreover, we observe satellite peaks associated with an incommensurate modulated (IM) orthorhombic structure for x >= 0.15 with y = 0, and x = 0.20 with y = 0.10. We were able to achieve a decrease by several orders of magnitude of the leakage current density and the emergence of a weak ferromagnetic response in the range of compositions 0.10< x <= 0.3 and 0
publisher ELSEVIER SCIENCE SA
issn 0925-8388
isbn 1873-4669
year published 2020
volume 835
digital object identifier (doi) 10.1016/j.jallcom.2020.155404
web of science category Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000538809200014
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