Polar and nonpolar atomic motions in the relaxor ferroelectric Pb1-3x/2LaxZr0.2Ti0.8O3 from dielectric, anelastic, and NMR relaxation -: art. no. 094112

被引:26
作者
Cordero, F
Corti, M
Craciun, F
Galassi, C
Piazza, D
Tabak, F
机构
[1] CNR, ISC, Area Ric Roma Tor Vergata, I-00133 Rome, Italy
[2] Univ Pavia, CNR, Unita INFM, I-27100 Pavia, Italy
[3] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy
[4] CNR, ISTEC, I-48018 Faenza, Italy
[5] Hacettepe Univ, Dept Engn Phys, TR-06532 Ankara, Turkey
关键词
D O I
10.1103/PhysRevB.71.094112
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Dielectric, anelastic, and La-139 NMR relaxation measurements have been made on the relaxor ferroelectric Pb1-3x/2La.Zr0.2Ti0.8O3 (PLZT) with x=0.22. The dielectric susceptibility exhibits the frequency dispersive maximum due to the freezing of the polar degrees of freedom around T 250 K. The anelastic and especially NMR relaxation, besides this maximum, indicate an intense and broad component at lower temperatures, attributed to rotational modes of the O octahedra, weakly coupled to the polar modes. It is discussed why such short range rotational instabilities, known to occur in the Zr-rich rhombohedral region of the PLZT phase diagram, might appear also in the Ti-rich region.
引用
收藏
页数:9
相关论文
共 44 条
[1]   Crossover from glassy to inhomogeneous-ferroelectric nonlinear dielectric response in relaxor ferroelectrics [J].
Bobnar, V ;
Kutnjak, Z ;
Pirc, R ;
Blinc, R ;
Levstik, A .
PHYSICAL REVIEW LETTERS, 2000, 84 (25) :5892-5895
[2]   O-3 tilt and the Pb/(Zr/Ti) displacement order parameters in Zr-rich PbZr1-xTi(x)O(3) from 20 to 500 K [J].
Cereceda, N ;
Noheda, B ;
Iglesias, T ;
FernandezdelCastillo, JR ;
Gonzalo, JA ;
Duan, N ;
Wang, YL ;
Cox, DE ;
Shirane, G .
PHYSICAL REVIEW B, 1997, 55 (10) :6174-6179
[3]   Aging in a relaxor ferroelectric: Scaling and memory effects [J].
Colla, EV ;
Chao, LK ;
Weissman, MB ;
Viehland, DD .
PHYSICAL REVIEW LETTERS, 2000, 85 (14) :3033-3036
[4]   Memory of multiple aging stages above the freezing temperature in the relaxor ferroelectric PLZT [J].
Cordero, F ;
Craciun, F ;
Franco, A ;
Piazza, D ;
Galassi, C .
PHYSICAL REVIEW LETTERS, 2004, 93 (09) :097601-1
[5]   Memory effects in dielectric and anelastic measurements of PLZT [J].
Cordero, F ;
Craciun, F ;
Franco, A ;
Galassi, C .
FERROELECTRICS, 2004, 302 :467-472
[6]   A neutron diffraction investigation into the rhombohedral phases of the perovskite series PbZr1-xTixO3 [J].
Corker, DL ;
Glazer, AM ;
Whatmore, RW ;
Stallard, A ;
Fauth, F .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (28) :6251-6269
[7]  
CROSS LE, 1987, FERROELECTRICS, V76, P241, DOI 10.2109/jcersj.99.829
[8]   THE SPONTANEOUS RELAXOR TO NORMAL FERROELECTRIC TRANSFORMATION IN LA-MODIFIED LEAD-ZIRCONATE-TITANATE [J].
DAI, XH ;
XU, Z ;
VIEHLAND, D .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1994, 70 (01) :33-48
[9]   DIELECTRIC-PROPERTIES OF TETRAGONAL LANTHANUM-MODIFIED LEAD-ZIRCONATE-TITANATE CERAMICS [J].
DAI, XH ;
DIGIOVANNI, A ;
VIEHLAND, D .
JOURNAL OF APPLIED PHYSICS, 1993, 74 (05) :3399-3405
[10]   Normal to relaxor ferroelectric transformations in lanthanum-modified tetragonal-structured lead zirconate titanate ceramics [J].
Dai, XH ;
Xu, Z ;
Viehland, D .
JOURNAL OF APPLIED PHYSICS, 1996, 79 (02) :1021-1026