A variable-temperature powder neutron diffraction study of ferroelectric Bi4Ti3O12

被引：213

作者：

Hervoches, CH ^{[1
]}

Lightfoot, P ^{[1
]}

机构：

[1] Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland

来源：

CHEMISTRY OF MATERIALS | 1999年 / 11卷 / 11期

关键词：

D O I：

10.1021/cm991090d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Powder neutron diffraction has been used to pinpoint the nature of the ferroelectric-paraelectric phase transition in Bi4Ti3O12 Below T-c(675 degrees C) the structure has been refined in orthorhombic space group B2cb [at 25 degrees C a = 5.4444(1) Angstrom, b = 5.4086(1) Angstrom c = 32.8425(6) Angstrom; at 650 degrees C a = 5.46183(5) Angstrom, b = 5.44843(5) Angstrom, c = 33.1742(3) Angstrom]. At 800 degrees C the structure has been refined as tetragonal, I4/mmm a = 3.86334(2) A, c = 33.2942(2) Angstrom. Bond valence sum analysis of the coordination environments around each metal site as a function of temperature clearly demonstrate that the driving force for the ferroelectric transformation is the requirement for Bi in the perovskite-like A sites to optimize its bonding to neighboring oxygen atoms.

引用

页码：3359 / 3364

页数：6

共 14 条

[1]

AURIVILLIUS B, 1950, ARK KEMI, V1, P499

[2] Cation disorder in ferroelectric Aurivillius phases of the type Bi(2)ANb(2)O(9) (A=Ba, Sr, Ca) [J].

Blake, SM ;

Falconer, MJ ;

McCreedy, M ;

Lightfoot, P .

JOURNAL OF MATERIALS CHEMISTRY, 1997, 7 (08) :1609-1613

[3] FATIGUE-FREE FERROELECTRIC CAPACITORS WITH PLATINUM-ELECTRODES [J].

DEARAUJO, CAP ;

CUCHIARO, JD ;

MCMILLAN, LD ;

SCOTT, MC ;

SCOTT, JF .

NATURE, 1995, 374 (6523) :627-629

[4] Variable-temperature X-ray diffraction of the ferroelectric transition in Bi4Ti3O12 [J].

Hirata, T ;

Yokokawa, T .

SOLID STATE COMMUNICATIONS, 1997, 104 (11) :673-677

[5]

Ismunandar, 1999, J MATER CHEM, V9, P541

[6]

Larson A. C., 1987, LAUR86748 LOS AL NAT

[7] STRUCTURAL BASIS OF FERROELECTRICITY IN BISMUTH TITANATE FAMILY [J].

NEWNHAM, RE ;

WOLFE, RW ;

DORRIAN, JF .

MATERIALS RESEARCH BULLETIN, 1971, 6 (10) :1029-&

[8] STRUCTURE REFINEMENT OF COMMENSURATELY MODULATED BISMUTH TITANATE, BI4TI3O12 [J].

RAE, AD ;

THOMPSON, JG ;

WITHERS, RL ;

WILLIS, AC .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1990, 46 :474-487

[9] STRUCTURE REFINEMENT OF COMMENSURATELY MODULATED BISMUTH STRONTIUM TANTALATE, BI2SRTA2O9 [J].

RAE, AD ;

THOMPSON, JG ;

WITHERS, RL .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1992, 48 :418-428

[10]

SMOLENSKII GA, 1961, SOV PHYS-SOL STATE, V3, P651

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