Phase transition, piezoelectric, and multiferroic properties of La(Co0.5Mn0.5)O3-modified BiFeO3-BaTiO3 lead-free ceramics

Lingling Luo, Na Jiang, Xiao Zou, Dongliang Shi, Ting Sun, Qiaoji Zheng, Chenggang Xu, Kwok Ho Lam, Dunmin Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

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 languageEnglish
Pages (from-to)2012-2022
Number of pages11
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume212
Issue number9
DOIs
Publication statusPublished - 1 Sep 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

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