HYDROSTATIC-PRESSURE EFFECT ON COMMENSURATE INCOMMENSURATE TRANSITION IN K2SEO4-ELASTIC ANOMALIES STUDIED BY BRILLOUIN-SCATTERING

被引：8

作者：

BENOIT, JP

HAURET, G

LUSPIN, Y

GILLET, AM

BERGER, J

机构：

[1] UNIV ORLEANS,ETUD PHYS MAT LAB,F-45045 ORLEANS,FRANCE

[2] CTR RECH PHYS HAUTES TEMP,CNRS,LP 4212,F-45045 ORLEANS,FRANCE

[3] UNIV PARIS 06,DRP,LAB 71,F-75230 PARIS 05,FRANCE

来源：

SOLID STATE COMMUNICATIONS | 1985年 / 54卷 / 12期

关键词：

LIGHT - Brillouin Scattering;

D O I：

10.1016/0038-1098(85)90768-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A Brillouin scattering study of the commensurate-incommensurate transition in K//2SeO//4 submitted to a hydrostatic pressure was performed. It was found that an increasing pressure lowers te transition temperature (dT//i/dP//i equals minus 59 K/GPa). The strong anomalies of velocity and damping of the longitudinal acoustic wave propagating along left bracket 001 right bracket are weakly affected when pressure acts. The effect of pressure on these anomalies has been calculated on the basis of the lowest order couplings eQ**2 and e**2Q**2 between strain e and order parameter Q.

引用

页码：1095 / 1098

页数：4