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Ferroelectrics Volume 405, 2010 - Issue 1
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SECTION E: RELAXOR FERROELECTRICS

Phase Transition Near the Morphotropic Phase Boundary in Pb(Zn1/3Nb2/3)O3- PbTiO3

Makoto Iwata Department of Engineering Physics, Electronics and Mechanics, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya, 466-8555, Japan
,
Kohei Sakakibara Department of Engineering Physics, Electronics and Mechanics, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya, 466-8555, Japan
,
Rintaro Aoyagi Department of Engineering Physics, Electronics and Mechanics, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya, 466-8555, Japan
,
Masaki Maeda Department of Engineering Physics, Electronics and Mechanics, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya, 466-8555, Japan
&
Yoshihiro Ishibashi Department of Physics, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, 812-8581, Japan
Pages 39-44 | Received 23 Aug 2009, Accepted 30 Sep 2009, Published online: 01 Dec 2010
 
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Abstract

Dielectric constants in Pb(Zn1/3Nb2/3)O3-PbTiO3 were measured under the zero-field heating after a preceding field cooling. It was confirmed that a sharp phase transition between ferroelectric phases in Pb(Zn1/3Nb2/3)O3 appears at 114°C, and the phase boundary connects to the morphotropic phase boundary in the Pb(Zn1/3Nb2/3)O3-PbTiO3 (PZN-PT) solid solution system. A new phase diagram in the poled sample of PZN-PT was proposed in a wider temperature range. It is concluded that the phase transition between ferroelectric phases of PZN is the one between the tetragonal and rhombohedral phases.

Acknowledgment

This work was supported in part by Grants-in-Aid for Scientific Research (B) (No. 19340084) and for Exploratory Research (No. 18654052) from the Japan Society for the Promotion of Science for MI.

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