Temperature dependence of the order parameter in NaK1-x(NH4)xC4H4O6&middot4H2O (x=0.28)

被引：0

作者：

Shiozaki, Y. ^{[1
]}

Toki, H. ^{[1
]}

Kabasawa, H. ^{[1
]}

Suzuki, E. ^{[1
]}

Nozaki, R. ^{[1
]}

机构：

[1] Hokkaido Univ, Sapporo, Japan

来源：

Ferroelectrics | 1996年 / 184卷 / 1 -4 pt 2期

关键词：

Crystals - Electric variables measurement - Hysteresis - Polarization - Reflection - Salts - Thermal effects;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Long range order parameter of Rochelle salt-ammonium Rochelle salt mixed crystal NaK1-x(NH4)xC4H4O6&middot4H2O, x=0.28 is studied from measuring X-ray Bragg intensity. Additionally the mixed crystal of x=0.27 are studied from observing ferroelectric hysteresis loop. The (050) X-ray Bragg intensity is proportional to (Tc-T) or Ps2. The results give sufficiently good agreement. The critical index β of Ps is obtained to be 0.47 from the hysteresis loop observation, which is almost equal to the value in the mean-field theory. The saturated value of the spontaneous polarization (Ps at T=0 K) is estimated to be 0.57 μF. The spontaneous polarization of other mixed crystals with x=0.56, 0.83 are also measured. The results show that the saturated value of the spontaneous polarization of the mixed crystal increases with increment of x in the range about 0.28<x<0.90.

引用

页码：301 / 304