FERROELECTRIC PROPERTIES OF NH4HSEO4 CRYSTALS

被引:89
作者
CZAPLA, Z
LIS, T
SOBCZYK, L
机构
[1] Institute of Chemistry, University of Wroclaw
来源
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1979年 / 51卷 / 02期
关键词
D O I
10.1002/pssa.2210510237
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Hydrogen ammonium selenate (AHSe) crystals are grown having in the room temperature 12 symmetry with lattice constants: a = 4.601, b = 7.547, and c = 19.258 Å; α = γ = 90°C and β = 90.90°. Measurements of electric permittivity yield a transition in 251.3 K from the para‐ to ferroelectric phase. The temperature anomaly is observed in the direction of the a‐axis only. The temperature dependence of permittivity fulfills the Curie‐Weiss law in a region of a few Kelvins before phase transition. The character of a spontaneous polarization and the observation of double hysteresis loops over the temperature of phase transition testify that this transioton is of first order. Copyright © 1979 WILEY‐VCH Verlag GmbH & Co. KGaA
引用
收藏
页码:609 / 612
页数:4
相关论文
共 4 条
  • [1] CZAPLA Z, IN PRESS
  • [2] FERROELECTRIC TRANSITION IN RUBIDIUM BISULFATE
    PEPINSKY, R
    VEDAM, K
    [J]. PHYSICAL REVIEW, 1960, 117 (06): : 1502 - 1503
  • [3] AMMONIUM HYDROGEN SULFATE - A NEW FERROELECTRIC WITH LOW COERCIVE FIELD
    PEPINSKY, R
    VEDAM, K
    HOSHINO, S
    OKAYA, Y
    [J]. PHYSICAL REVIEW, 1958, 111 (06): : 1508 - 1510
  • [4] POPRAWSKI R, IN PRESS