Giant electrostrictive coefficient in rapidly cooled nanodisordered KTa1−xNbxO3 lead-free single crystals

The temperature dependent electrostrictive effect, with respect to increasing the cooling rate to a cooling temperature, was quantitatively investigated in potassium tantalate niobate (KTN) lead-free single crystals above and near Curie temperature (TC). High work-function Pt electrodes are used to...

Full description

Saved in:
Bibliographic Details
Published inAIP advances Vol. 11; no. 3; pp. 035020 - 035020-5
Main Authors Shang, Annan, Chen, Chang-Jiang, Liu, Ruijia, Lee, Yun Goo, Chao, Ju-Hung, Yin, Shizhuo
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.03.2021
AIP Publishing LLC
Subjects
Charge injection
Cooling
Cooling rate
Curie temperature
Electric fields
Electrostriction
Lead free
Single crystals
Temperature dependence
Online AccessGet full text

Cover

More Information
Summary:The temperature dependent electrostrictive effect, with respect to increasing the cooling rate to a cooling temperature, was quantitatively investigated in potassium tantalate niobate (KTN) lead-free single crystals above and near Curie temperature (TC). High work-function Pt electrodes are used to minimize the effect of charge injection, and the electric field induced displacement was measured with Michelson interferometry. It was found that a giant electrostrictive coefficient of 696 × 10−16 m2/V2 could be obtained at a high cooling rate of 0.75 °C/s to a temperature of TC + 4.5 °C due to the evolution of polar nano-regions, which is one order of magnitude larger than the previously reported value in KTN crystals. This strengthens the realization of replacing toxic lead-based electrostrictive materials with environmentally friendly KTN materials in real world applications.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0034783