Open AccessOrientation dependence of electrocaloric effects in Pb(Zn1/3Nb2/3)-PbTiO3 single crystals
Author(s) -
Rami Chukka,
Suresh K. Vandrangi,
Zuhuang Chen,
Lü You,
Junling Wang,
Ping Yang,
Lang Chen
Publication year - 2013
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4816441
Subject(s) - materials science , electrocaloric effect , ferroelectricity , tetragonal crystal system , isothermal process , phase transition , trigonal crystal system , condensed matter physics , phase (matter) , crystallography , thermodynamics , dielectric , crystal structure , optoelectronics , chemistry , physics , organic chemistry
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