AIP Advances (Jul 2013)

Orientation dependence of electrocaloric effects in Pb(Zn1/3Nb2/3)-PbTiO3 single crystals

  • Rami Chukka,
  • Suresh Vandrangi,
  • Zuhuang Chen,
  • Lu You,
  • Junling Wang,
  • Ping Yang,
  • Lang Chen

DOI
https://doi.org/10.1063/1.4816441
Journal volume & issue
Vol. 3, no. 7
pp. 072118 – 072118

Abstract

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Electrocaloric effects of (001), (011) and (111) oriented single crystals have been thoroughly investigated to study the ferroelectric-ferroelectric (FE-FE) phase transition induced isothermal entropy changes in 0.94Pb(Zn1/3Nb2/3)O3–0.06PbTiO3 (PZN-PT) material. The results showed that the PZN-PT crystals oriented in (111) direction exhibit ∼ 38% higher electrocaloric cooling values near lower critical phase transitions from rhombohedral (R) to tetragonal (T) phases in PZN-PT crystals, compared to those oriented in (011) direction. Though (111) samples display higher cooling values, (011) samples showed broader cooling curves due to their easily switchable characteristics between R and T phases.