Structural changes in Sr9In(PO4)7 during antiferroelectric phase transition

被引：5
作者：
Deyneko, D. V. [1 ]
Morozov, V. A. [1 ,2 ]
Stefanovich, S. Yu. [1 ]
Belik, A. A. [3 ]
Lazoryak, B. I. [1 ]
Lebedev, O. I. [4 ]
机构：
[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia
[2] Univ Antwerp, EMAT, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
[3] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton WPI MANA, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan
[4] CRISMAT ENSICAEN, Caen, France
来源：
INORGANIC MATERIALS | 2016年 / 52卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
phosphates; strontium; indium; X-ray powder diffraction; electron microscopy; antiferroelectric phase transition; NONLINEAR-OPTICAL PROPERTIES; CRYSTAL-STRUCTURE; X-RAY; DIELECTRIC-PROPERTIES; DIFFRACTION; REFINEMENT; PHOSPHATES; SCATTERING; VANADATES; PRESSURE;
D O I：
10.1134/S0020168516010039
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Structural changes in Sr9In(PO4)(7) during the antiferroelectric (AFE) phase transition are studied by X-ray powder diffraction, electron microscopy, second-harmonic-generation, and dielectric measurements. Sr9In(PO4)(7) complements a group of Ca-3(VO4)(2)-type ferroelectric (FE) phosphates and vanadates and is the first example of an AFE material in this family. Antiparallel shifts of Sr atoms from their average positions and ordering of the P1O(4) tetrahedra form two contributions in the structural mechanism of the AFE phase transition: a displacive contribution and an order-disorder constituent, respectively. The displacive and order-disorder type of structural changes may account for the obtained value of the Curie-Weiss constant (C similar to 10(4) K) which is in between the value usually observed for pure displacive (C similar to 10(5) K) and that for orderdisorder phase transitions (C similar to 10(3) K). The structural mechanism of the AFE phase transition in Sr9In(PO4)(7) is very similar to that of the FE phase transition in Ca9R(PO4)(7) and Ca9R(VO4)(7). Both displacive and orderdisorder contributions are responsible for the physical properties of the Ca-3(VO4)(2)-type materials.
引用
收藏
页码：176 / 185
页数：10
相关论文
共 44 条
  • [1] Occurrence of a new superlattice phase across the antiferroelectric phase transition in Sr1-xCaxTiO3 (x=0.30 and 0.40)
    Anwar, Shahid
    Lalla, N. P.
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (32)
  • [2] New noncentrosymmetric vanadates Sr9R(VO4)7 (R = Tm, Yb, and Lu):: Synthesis, structure analysis, and characterization
    Belik, AA
    Takano, M
    Boguslavsky, MV
    Stefanovich, SY
    Lazoryak, BI
    [J]. CHEMISTRY OF MATERIALS, 2005, 17 (01) : 122 - 129
  • [3] Phase transitions in Sr-containing phosphates and vanadates with β-Ca3(PO4)2-related structures
    Belik, AA
    Azuma, M
    Takano, M
    [J]. SOLID STATE IONICS, 2004, 172 (1-4) : 533 - 537
  • [4] Whitlockite-related phosphates Sr9A(PO4)7 (A=Sc, Cr, Fe, Ga, and In):: Structure refinement of Sr9In(PO4)7 with synchrotron X-ray powder diffraction data
    Belik, AA
    Izumi, F
    Ikeda, T
    Okui, M
    Malakho, AP
    Morozov, VA
    Lazoryak, BI
    [J]. JOURNAL OF SOLID STATE CHEMISTRY, 2002, 168 (01) : 237 - 244
  • [5] Positional and orientational disorder in a solid solution of Sr9+xNi1.5-x(PO4)7 (x=0.3)
    Belik, AA
    Izumi, F
    Ikeda, T
    Morozov, VA
    Dilanian, RA
    Torii, S
    Kopnin, EM
    Lebedev, OI
    Van Tendeloo, G
    Lazoryak, BI
    [J]. CHEMISTRY OF MATERIALS, 2002, 14 (10) : 4464 - 4472
  • [6] Antiferroelectric phase transition in pyrochlore-like (Dy1 - xCax)2Ti2O7 - δ (x=0, 0.1) high temperature conductors
    Belov, D. A.
    Shlyakhtina, A. V.
    Stefanovich, S. Yu.
    Shchegolikhin, A. N.
    Knotko, A. V.
    Karyagina, O. K.
    Shcherbakova, L. G.
    [J]. SOLID STATE IONICS, 2011, 192 (01) : 188 - 194
  • [7] STRUCTURAL AND ELECTRICAL PROPERTIES OF SILVER NIOBATE AND SILVER TANTALATE
    FRANCOMBE, MH
    LEWIS, B
    [J]. ACTA CRYSTALLOGRAPHICA, 1958, 11 (03): : 175 - 178
  • [8] REFINEMENT OF THE CRYSTAL-STRUCTURE OF NH4H2ASO4 ABOVE AND BELOW ANTIFERROELECTRIC PHASE-TRANSITION TEMPERATURE
    FUKAMI, T
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1989, 58 (09) : 3429 - 3430
  • [9] X-RAY STUDY OF CRYSTAL-STRUCTURE OF ND4D2PO4 IN THE ANTIFERROELECTRIC PHASE
    FUKAMI, T
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1988, 57 (04) : 1287 - 1290
  • [10] CALCIUM ORTHO-VANADATE, CA3(VO4)2 - NEW HIGH-TEMPERATURE FERROELECTRIC
    GLASS, AM
    ABRAHAMS, SC
    BALLMAN, AA
    LOIACONO, G
    [J]. FERROELECTRICS, 1978, 17 (3-4) : 579 - 582
12345