Influence of Finite Size on the Electrocaloric Response in PbTiO3 Ceramics Near Room Temperature Using Landau Theory

Zhen Liu, Bin Yang, Wenwu Cao, Turab Lookman

Research output: Contribution to journalArticle

Abstract

We investigate the influence of grain size on the electrocaloric properties of ferroelectric systems using Landau theory. We study how the phase transformation temperature and electrocaloric property can be tuned by changing the grain size close to the critical size. Our results show that the electrocaloric coefficient at room temperature can be greatly enhanced by controlling the grain size. In particular, we calculate the adiabatic temperature change, ΔT to be ≈2 K with an electric field difference ΔE = 50 kV cm−1 at room temperature in a model for PbTiO3 ceramics. The results provide an approach to improving the electrocaloric properties at room temperature in experiments by engineering the grain size.

Original languageEnglish (US)
Article number1700469
JournalPhysica Status Solidi (B) Basic Research
Volume255
Issue number2
DOIs
StatePublished - Feb 1 2018

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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