PMN-PT and PIN-PMN-PT single crystals grown by continuous-feeding Bridgman method

•A 320 mm long PMN-PT single crystal boule was grown by continuous-feeding Bridgman method.•The method realizes high uniformity for composition and properties within a boule.•A 0.31PIN-0.43PMN-0.26PT crystal showed a high coercive field (550 V/mm) and high phase transition temperature (134 °C). Pb(M...

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Bibliographic Details
Published inJournal of crystal growth Vol. 531; p. 125364
Main Authors Echizenya, Kazuhiko, Nakamura, Keiichiro, Mizuno, Keisuke
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.02.2020
Elsevier BV
Subjects
A1. Segregation
A2. Bridgman technique
A2. Single crystal growth
B1. Perovskites
B2. Piezoelectric materials
Boules
Bridgman method
Coercivity
Composition
Crystal growth
High temperature
Lead titanates
Phase transitions
Piezoelectricity
Single crystals
Transition temperature
A2. Bridgman technique
B1. Perovskites
A1. Segregation
A2. Single crystal growth
B2. Piezoelectric materials
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Summary:•A 320 mm long PMN-PT single crystal boule was grown by continuous-feeding Bridgman method.•The method realizes high uniformity for composition and properties within a boule.•A 0.31PIN-0.43PMN-0.26PT crystal showed a high coercive field (550 V/mm) and high phase transition temperature (134 °C). Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) and Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PMN-PT) single crystals are superior piezoelectric materials. The single crystal boules grown by the Bridgman method include large property variation due to compositional segregation. We have developed the continuous-feeding Bridgman method to eliminate the compositional segregation. A long size PMN-PT single crystal boule (80 mm in diameter and 320 mm in length) was successfully grown under optimized growth conditions. The boule showed high property uniformity (10% in d33 variation) as a result of high composition uniformity. This results in productivity enhancement of 24% compared to our conventional 220 mm long boules. Two PIN-PMN-PT single crystal boules each with different target composition were also successfully grown. They showed stable properties and also higher coercive field (Ec = 510–550 V/mm) than PMN-PT. One of the crystals exhibited a very high phase transition temperature (Trt = 134 °C). The PIN-PMN-PT single crystals produced during this study will be beneficial for high power or high temperature applications.
ISSN:0022-0248
1873-5002
DOI:10.1016/j.jcrysgro.2019.125364