Negative correlation between electrical response and domain size in a Ti-composition-gradient Pb[(Mg1/3Nb2/3)1-xTix]O3 crystal near the morphotropic phase boundary

被引：16

作者：

Shimizu, Daisuke ^{[1
]}

Tsukada, Shinya ^{[2
]}

Matsuura, Masato ^{[3
]}

Sakamoto, Jun'ya ^{[1
]}

Kojima, Seiji ^{[4
]}

Namikawa, Kazumichi ^{[5
,6
]}

Mizuki, Jun'ichiro ^{[1
,6
,7
]}

Ohwada, Kenji ^{[1
,6
,7
]}

机构：

[1] Kwansei Gakuin Univ, Sanda, Hyogo 6691337, Japan

[2] Shimane Univ, Fac Educ, Matsue, Shimane 6908504, Japan

[3] Comprehens Res Org Sci & Soc CROSS, Res Ctr Neutron Sci & Technol, Tokai, Ibaraki 3191106, Japan

[4] Univ Tsukuba, Pure & Appl Sci, Tsukuba, Ibaraki 3058573, Japan

[5] Tokyo Gakugei Univ, Koganei, Tokyo 1848501, Japan

[6] Japan Sci & Technol Agcy JST, CREST, Kawaguchi, Saitama 3320012, Japan

[7] Japan Atom Energy Agcy, Quantum Beam Sci Ctr, SPring 8, Sayo, Hyogo 6795148, Japan

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 17期

关键词：

TITANATE SINGLE-CRYSTALS; SOLID-SOLUTION SYSTEMS; POLARIZATION ROTATION; OXIDE FERROELECTRICS; MONOCLINIC PHASE; PEROVSKITE;

D O I：

10.1103/PhysRevB.92.174121

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phase diagram and the relationship between the crystal coherence length and electrical response of Pb[(Mg1/3Nb2/3)(1-x)Ti-x]O-3 (PMN-xPT) near the morphotropic phase boundary (MPB) have been precisely investigated using a single crystal with a Ti composition gradient by synchrotron x-ray diffraction and inelastic light scattering at room temperature. The crystal has two boundaries at Ti compositions of 29.0 and 34.7 mol% which correspond to the phase boundaries between the monoclinic B (MB) and C (MC) phases and between the MC and tetragonal (T) phases, respectively. The crystal coherence length determined from the widths of Bragg peaks varies by over two orders of magnitude in a 10 mol% range of the Ti composition. It is shown that there is a strong negative correlation between the electrical response and the crystal coherence length at the sub-mu m scale. The results are explained by the size effects of domains near the MPB.

引用

页数：5

共 45 条

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