Dielectric anisotropy near morphotropic phase boundary in Pb(Zn1/3Nb2/3)O3-xPbTiO3 crystals

被引：22

作者：

Iwata, Makoto ^{[1
]}

Sakakibara, Kohei

Katsuraya, Kohei

Aoyagi, Rintaro

Maeda, Masaki

Suzuki, Ikuo

Ishibashi, Yoshihiro

机构：

[1] Nagoya Inst Technol, Grad Sch Engn, Dept Engn Phys Elect & Mech, Nagoya, Aichi 4668555, Japan

[2] Aichi Shukutoku Univ, Dept Business, Nagakute, Aichi 4801197, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2006年 / 45卷 / 9B期

关键词：

relaxor; ferroelectric; MPB; dielectric constant; perovskite; AFM; EFM;

D O I：

10.1143/JJAP.45.7543

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

It was proposed that large dielectric constants in Pb(Zn1/3Nb2/3)O-3-xPbTiO(3) (PZN-xPT) crystals are mainly due to the fluctuation of polarization along the spherical direction (perpendicular to the spontaneous polarization) near the morphotropic phase boundary (MPB), named transversal instability [M. Iwata and Y. Ishibashi: in Ferroelectric Thin Films, ed. M. Okuyama and Y. Ishibashi (Springer, 2005) Part 111, p. 127]. The dielectric anisotropy in the MPB region of PZN-xPT was investigated to clarify the origin of the large dielectric constant in perovskite-type relaxors. It was found that the dielectric constant perpendicular to the spontaneous polarization indicating transversal instability markedly increases as it approaches MPB. The dielectric anisotropy and large dielectric constant near the MPB were discussed in terms of the phenomenological theory.

引用

页码：7543 / 7547

页数：5

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