LOW-TEMPERATURE PHASE-TRANSITION OF A CRYSTAL IN THE LITHIUM SODIUM NIOBATE SYSTEM

被引：33

作者：

ZHONG, WL ^{[1
]}

ZHANG, PL ^{[1
]}

ZHAO, HS ^{[1
]}

YANG, ZH ^{[1
]}

SONG, YY ^{[1
]}

CHEN, HC ^{[1
]}

机构：

[1] SHANDONG UNIV,INST CRYSTAL MAT,JINAN 250100,PEOPLES R CHINA

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.46.10583

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied a crystal of composition Li0.03Na0.97NbO3 that undergoes a first-order ferroelectric-ferroelectric phase transition at about 180 K on cooling and near 260 K on heating. Evidence of the phase transition comes from anomalies in the dielectric constant, dc electrical resistivity, pyroelectric coefficient, spontaneous polarization, specific beat, and thermal expansion. X-ray-diffraction data reveal that the room-temperature phase is orthorhombic with space group Pc2(1)b (C2v5) and the low-temperature phase is rhombohedral with space group R 3c (C3v6). Relationships between their unit-cell parameter are obtained. The spontaneous polarization in these two phases is determined. The large thermal hysteresis of the transition is ascribed to the large structural change required at the transition.

引用

页码：10583 / 10587

页数：5

共 15 条

[1] FERROELECTRIC LITHIUM NIOBATE .5. POLYCRYSTAL X-RAY DIFFRACTION STUDY BETWEEN 24 DEGREES AND 1200 DEGREES C [J].

ABRAHAMS, SC ;

LEVINSTEIN, HJ ;

REDDY, JM .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1966, 27 (6-7) :1019-+

[2] FERROELECTRIC LITHIUM NIOBATE .4. SINGLE CRYSTAL NEUTRON DIFFRACTION STUDY AT 24 DEGREES C [J].

ABRAHAMS, SC ;

HAMILTON, WC ;

REDDY, JM .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1966, 27 (6-7) :1013-&

[3]

CROSS LE, 1955, PHILOS MAG, V46, P453

[4] LOW-TEMPERATURE PHASE-TRANSITION OF SODIUM NIOBATE AND STRUCTURE OF LOW-TEMPERATURE PHASE, N [J].

DARLINGTON, CNW ;

MEGAW, HD .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 1973, 29 (OCT15) :2171-+

[5]

Grueninger H. W., 1975, Berichte der Deutschen Keramischen Gesellschaft, V52, P238

[6] STRUCTURAL DEFORMATION IN (LI, NA)NBO3 [J].

GRUENINGER, HW ;

ZEYFANG, RR ;

REEVES, CP .

FERROELECTRICS, 1976, 11 (3-4) :413-415

[7] DIELECTRIC AND ELECTROMECHANICAL PROPERTIES OF (LI, NA)NBO3 CERAMICS [J].

HENSON, RM ;

ZEYFANG, RR ;

KIEHL, KV .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1977, 60 (1-2) :15-17

[8]

MUHLL RV, 1979, SOLID STATE COMMUN, V31, P151

[9] FERROELECTRIC AND PYROELECTRIC STUDIES OF A CRYSTAL OF COMPOSITION LI0.02NA0.98NBO3. [J].

SADEL, A ;

VONDERMUHLL, R ;

RAVEZ, J ;

HAGENMULLER, P .

FERROELECTRICS, 1983, 47 (3-4) :169-175

[10]

SONG YY, 1989, SYNTHETIC CRYSTALS, V18, P117

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