Temperature evolution of short- and medium-range ionic correlations in relaxor ferroelectric [Pb(Zn1/3Nb2/3)O3]1-x[PbTiO3]x (x=0.05, 0.12)

被引：24
作者：
Jeong, I. -K. [1 ,2 ,3 ]
机构：
[1] Pusan Natl Univ, Dept Phys Educ, Pusan 609735, South Korea
[2] Pusan Natl Univ, Res Ctr Dielect & Adv Matter Phys, Pusan 609735, South Korea
[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 05期
关键词：
crystal structure; ferroelectric transitions; lead compounds; relaxor ferroelectrics; PHASE-TRANSITIONS; LOCAL-STRUCTURE; POLARIZATION; BEHAVIOR;
D O I：
10.1103/PhysRevB.79.052101
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We performed temperature-dependent neutron pair distribution function (PDF) analysis on relaxor ferroelectric [Pb(Zn1/3Nb2/3)O-3](1-x)[PbTiO3](x) (PZN-xPT) (x=0.05 and 0.12) from 550 to 150 K. The experimental PDF spectra clearly demonstrate that PZN-5%PT and PZN-12%PT have basically same ionic pair correlations up to the pair distance r similar to 15 A at all temperatures despite their difference in low-temperature long-range crystal structures. At longer pair distances 30 < r < 50 A, however, ionic pair correlations of PZN-5%PT and PZN-12%PT gradually diverge from each other below T similar to 450 K. Based on these PDF results, we propose that a distinct ordering of polar nanoregions develops between PZN-5%PT and PZN-12%PT with decreasing temperature.
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页数：4
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