LINEAR BIREFRINGENCE STUDIES ON MIXED-CRYSTALS OF RB1-X(NH4)XH2ASO4

被引：3

作者：

SOMMER, D ^{[1
]}

KLEEMANN, W ^{[1
]}

YOON, JG ^{[1
]}

KWUN, SI ^{[1
]}

KIM, S ^{[1
]}

机构：

[1] SEOUL NATL UNIV,DEPT PHYS,SEOUL 151,SOUTH KOREA

来源：

FERROELECTRICS | 1990年 / 106卷

关键词：

D O I：

10.1080/00150199008214571

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The linear birefringences Δnac and Δnab, of Rb1-x(NH4)x H2AsO4 have been measured on ferroelectric (x=0.13), structural glass (x=0.20 and 0.37), and antiferroelectric mixtures (x=0.49). Domain observations reveal one and two orthorhombic low-T phases for x=0.13 (Tc=85.5 K: second-order transition with random interaction Ising model critical exponent β=0.35) and for x=0.49, respectively (Tc1=85 K: second-order transition, Tc2∼6O K: smeared first-order transition). In the glassy systems, x=0.20 and 0.37, Δnac reveals <P32>>0 for T-<150 K, whereas Δnab=0 at any T. © 1990, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：131 / 136

页数：6

共 13 条

[1] BRILLOUIN SPECTROSCOPY OF POLARIZATION FLUCTUATIONS IN RB1-X(NH4)XH2PO4 MIXED-CRYSTALS - CONCENTRATION-DEPENDENCE [J].