Size effects of electrocaloric cooling in ferroelectric nanowires

Houbing Huang, Guangzu Zhang, Xingqiao Ma, Deshan Liang, Jianjun Wang, Yang Liu, Qing Wang, Long-qing Chen

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Considering finite size effect, ferroelectric nanowires may show novel phenomena compared to ferroelectric thin film and bulk. Here we investigated the effect of width and surface compressive stress on electrocaloric cooling in ferroelectric nanowire by using thermodynamic calculations and phase-field simulations. It was found that the isothermal entropy change and adiabatic temperature change in nanowire are 50% larger than that in thin film due to different mechanical boundary conditions of nanowire and thin film. The largest electrocaloric temperature changes were shown to increase significantly either with the decrease in nanowire width or the increase with the surface compressive stress. It was also revealed that the largest intrinsic entropy changes are almost the same for different nanowires with different widths and various stresses. The present study therefore contributes to the understanding of size effects of electrocaloric cooling and provides guidance for experiments to design high-efficiency cooling devices using ferroelectric nanosystems.

Original languageEnglish (US)
Pages (from-to)1566-1575
Number of pages10
JournalJournal of the American Ceramic Society
Volume101
Issue number4
DOIs
StatePublished - Apr 1 2018

Fingerprint

size effect
Nanowires
Ferroelectric materials
Cooling
cooling
entropy
Compressive stress
Ferroelectric devices
Entropy
boundary condition
thermodynamics
temperature
Nanosystems
Thin films
Ferroelectric thin films
simulation
experiment
Boundary conditions
Thermodynamics
Temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

Cite this

Huang, Houbing ; Zhang, Guangzu ; Ma, Xingqiao ; Liang, Deshan ; Wang, Jianjun ; Liu, Yang ; Wang, Qing ; Chen, Long-qing. / Size effects of electrocaloric cooling in ferroelectric nanowires. In: Journal of the American Ceramic Society. 2018 ; Vol. 101, No. 4. pp. 1566-1575.
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Size effects of electrocaloric cooling in ferroelectric nanowires. / Huang, Houbing; Zhang, Guangzu; Ma, Xingqiao; Liang, Deshan; Wang, Jianjun; Liu, Yang; Wang, Qing; Chen, Long-qing.

In: Journal of the American Ceramic Society, Vol. 101, No. 4, 01.04.2018, p. 1566-1575.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Size effects of electrocaloric cooling in ferroelectric nanowires

AU - Huang, Houbing

AU - Zhang, Guangzu

AU - Ma, Xingqiao

AU - Liang, Deshan

AU - Wang, Jianjun

AU - Liu, Yang

AU - Wang, Qing

AU - Chen, Long-qing

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AB - Considering finite size effect, ferroelectric nanowires may show novel phenomena compared to ferroelectric thin film and bulk. Here we investigated the effect of width and surface compressive stress on electrocaloric cooling in ferroelectric nanowire by using thermodynamic calculations and phase-field simulations. It was found that the isothermal entropy change and adiabatic temperature change in nanowire are 50% larger than that in thin film due to different mechanical boundary conditions of nanowire and thin film. The largest electrocaloric temperature changes were shown to increase significantly either with the decrease in nanowire width or the increase with the surface compressive stress. It was also revealed that the largest intrinsic entropy changes are almost the same for different nanowires with different widths and various stresses. The present study therefore contributes to the understanding of size effects of electrocaloric cooling and provides guidance for experiments to design high-efficiency cooling devices using ferroelectric nanosystems.

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