Ferroelastic crystals and their nonlinear elastic properties observed in frequency range from gigahertz to milihertz

被引：8
|
作者：
Wiesner, Maciej [1 ]
机构：
[1] Adam Mickiewicz Univ, Fac Phys, Poznan, Poland
来源：
PHASE TRANSITIONS | 2009年 / 82卷 / 10期
关键词：
ferroelastic; phase transitions; incommensurate; Brillouin; DMA; composite oscillator bar; piezoeffect; ultrasound; unification; STRUCTURAL PHASE-TRANSITIONS; DIFFUSION CENTRAL-PEAK; LICSSO4; SINGLE-CRYSTALS; BRILLOUIN-SCATTERING; INTERNAL-FRICTION; FERROELECTRIC-CRYSTALS; DIELECTRIC-DISPERSION; COMPOSITE OSCILLATOR; SRTIO3; CRYSTALS; DOMAIN-WALLS;
D O I：
10.1080/01411590903372622
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The experiments reported in this article have been performed to unify the results of earlier and recent determinations of parameters describing the elastic properties of Rb4LiH3(SO4)4, LiCsSO4 (LCS) and KH2PO4 crystals measured by different experimental methods. The above crystals undergo a second-order phase transition, incommensurate phase transition (PT) and a first-order but close to second-order phase transition, respectively. To investigate the elastic properties of the crystals in the frequency range from 10-1 to 1010 Hz, five experimental methods were applied: dynamic mechanical analysis, piezoelectric resonance, composite oscillator bar, ultrasonic wave propagation and Brillouin light scattering. The results of the experiments allowed identification of the processes contributing to the elastic response of the crystals investigated. Moreover, for the LCS crystal a model of the incommensurate PT was presented.
引用
收藏
页码：699 / 754
页数：56
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