High dielectric tunability, electrostriction strain and electrocaloric strength at a tricritical point of tetragonal, rhombohedral and pseudocubic phases

Biaolin Peng, Qi Zhang, Xing Li, Tieyu Sun, Shanming Ke, Mao Ye, Yu Wang, Wei Lu, Hanben Niu, Xierong Zeng, Huiqing Fan, Haitao Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)

Abstract

A relaxor ferroelectric Pb(Ni1/3Nb2/3)0.5Zr0.15Ti0.35O3 (PNNZT) ceramic was reported, designed upon an idea that the composition is selected to near a tricritical point of tetragonal, rhombohedral and pseudocubic phases. High dielectric tunability of 67%, simultaneously with high electrostriction strain of 0.319% and high electrocaloric strength (ΔT/ΔE) of 32.5 mK cm/kV are achieved, which make it a promising multifunctional material for applications in dielectric tunable, precisely controlled and electric refrigeration devices. This is endowed by the low energy barrier among the transitions of phases and strong relaxor ferroelectric activities around the tricritical point. This work provides a guide for the design of multifunctional ferroelectric materials and can promote the development of other multifunctional ferroic materials.
Original languageEnglish
Pages (from-to)597-602
Number of pages6
JournalJournal of Alloys and Compounds
Volume646
DOIs
Publication statusPublished - 1 Jul 2015

Keywords

  • Dielectric tenability
  • Electrocaloric
  • Electrostriction
  • Morphotropic phase boundary
  • Relaxor

ASJC Scopus subject areas

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

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