Abstract
KGaA, Weinheim. (0.75-x)BiFeO3-0.25BaTiO3-xLa(Co0.5Mn0.5)O3 + 1 mol% MnO2 lead-free ceramics (x = 0-0.10) were synthesized by a conventional solid-state reaction route and the effects of La(Co0.5Mn0.5)O3 on phase transition, piezoelectric, ferroelectric, and multiferroic properties of the ceramics were investigated. The ceramics can be well sintered at 960°C for 2 h. After the addition of La(Co0.5Mn0.5)O3, the crystal structure of the ceramics is transformed from rhombohedral (space group R3c) to orthorhombic symmetry (space group Amm2), and the morphotropic phase boundary (MPB) of rhombohedral and orthorhombic phases is formed at x = 0.01-0.03. The dielectric peak of the ceramics was found to become diffusive with increasing x. The ceramics with x = 0-0.03 possess strong piezoelectricity with d33 of 95-108 pC N-1, strong ferroelectricity with Pr of 2.2-18.1 μC cm-2, considerable magnetoelectric coefficient of 372-672 mV/cmOe, and high Curie temperature of 523-659°C, showing potential applications in multiferroic devices.
Original language | English |
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Pages (from-to) | 2012-2022 |
Number of pages | 11 |
Journal | Physica Status Solidi (A) Applications and Materials Science |
Volume | 212 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 Sept 2015 |
Keywords
- ferroelectric properties
- lead-free ceramics
- magnetic properties
- multiferroics
- phase transitions
- piezoelectric properties
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering
- Materials Chemistry