Structural and electrocaloric properties of multiferroic-BiFeO3doped 0.94Bi0.5Na0.5TiO3-0.06BaTiO3solid solutions

Guangping Zheng, Sarir Uddin, Xiucheng Zheng, Junhe Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

Abstract

Single-phase (1-x)(0.94Bi0.5Na0.5TiO3-0.06BaTiO3)-xBiFeO3(BNT-BT-xBF, x = 0.05, 0.1 and 0.15) solid solutions are fabricated using a modified citrate method. The structural, ferroelectric and electrocaloric properties are significantly affected by the multiferroic BiFeO3doping, which is found to favor the antiferroelectric (AFE) state of the solid solutions. The dynamic mechanical analysis suggests that the BiFeO3induced ordering of oxygen octahedrons plays a dominant role in the formation of AFE incommensurate phases and leads to the enhanced negative electrocaloric effect (ECE). A maximum ECE temperature change of 1.65 °C under an applied field of 70 kV/cm is observed. It is suggested that the magnetoelectric coupling is effective in enhancing the negative ECE in BNT-BT-xBF.
Original languageEnglish
Pages (from-to)249-255
Number of pages7
JournalJournal of Alloys and Compounds
Volume663
DOIs
Publication statusPublished - 5 Apr 2016

Keywords

  • Anelastic properties
  • Antiferroelectric
  • Electrocaloric effects
  • Lead-free ferroelectrics
  • Multiferroic
  • Oxygen vacancies

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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