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American Institute of Physics, AIP Advances, 7(3), p. 072118

DOI: 10.1063/1.4816441

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

Journal article published in 2013 by Rami Chukka, Suresh Vandrangi, Zuhuang Chen, Lu You, Junling Wang ORCID, Ping Yang, Lang Chen
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

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.