Electromechanical and magnetic properties of BiFeO3-LaFeO3-CaTiO3 ceramics near the rhombohedral-orthorhombic phase boundary

authors	Karpinsky, DV; Troyanchuk, IO; Sikolenko, V; Efimov, V; Kholkin, AL
nationality	International
journal	JOURNAL OF APPLIED PHYSICS
keywords	EARTH-SUBSTITUTED BIFEO3; PIEZOELECTRIC PROPERTIES; STRUCTURAL TRANSFORMATION; MULTIFERROIC CERAMICS; THIN-FILMS; TRANSITION; TITANATE; BEHAVIOR; LA; TI
abstract	BiFeO3-LaFeO3-CaTiO3 ceramics have been studied by X-ray diffraction, magnetization measurements, and piezoresponse force microscopy (PFM). The compositional ranges of the polar, antipolar, and non-polar phases have been estimated. PFM measurements testify gradual decrease of piezoelectric response in Bi(0.85-x)La(0.15)CaxFe(1-x)Ti(x)O(3) system with Ca/Ti content increase, except a narrow concentration region near polar-antipolar phase boundary where piezoelectric signal shows maximum value. It is found that increase of dopant concentration leads to apparent decrease of the off-center Bi-O displacement and, consequently, causes a reduction of piezoelectric response. It is concluded that notable remanent magnetization in polar and non-polar structural phases is a result of the Dzyaloshinsky-Moria interaction. (C) 2013 AIP Publishing LLC
publisher	AMER INST PHYSICS
issn	0021-8979
year published	2013
volume	113
issue	18
digital object identifier (doi)	10.1063/1.4801960
web of science category	Physics, Applied
subject category	Physics
unique article identifier	WOS:000319294100124