LINEAR AND NONLINEAR LIGHT-SCATTERING NEAR THE PHASE-TRANSITION IN KH(2)PO(4)

被引：10

作者：

DREVENSEK, I ^{[1
]}

ZGONIK, M ^{[1
]}

COPIC, M ^{[1
]}

BLINC, R ^{[1
]}

FUITH, A ^{[1
]}

SCHRANZ, W ^{[1
]}

FALLY, M ^{[1
]}

WARHANEK, H ^{[1
]}

机构：

[1] UNIV VIENNA,INST EXPTL PHYS,A-1090 VIENNA,AUSTRIA

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.49.3082

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The angular and temperature dependence of the linear light scattering and the temperature dependence of the second-harmonic nonlinear light scattering were studied ill two different samples of KH2PO4 (KDP) crystal: one from a zone close to the seed and another from a zone far from the seed. The angular dependence of the intensity of the linearly scattered light front the sample from the zone close to the seed shows a strong peak for the near Z(YX)Y scattering. This scattering originates from growth bands parallel to the (0 (1) over bar 1) lattice planes in the pyramidal growth sector. The temperature dependence of the magnitude of this peak shows a considerable increase in the vicinity of the phase transition from the paraelectric to ferroelectric phase. Such an increase in the linear light scattering was not observed in the sample from the zone far from the seed. The anomalies related to the growth bands parallel to the (010) lattice planes in the prismatic growth sector were investigated also by second-harmonic light scattering. Here again a considerable increase in the intensity of the frequency-doubled scattered light was observed in the vicinity of the phase-transition temperature. The results of the light-scattering experiments are compared with an x-ray topographic study of the lattice defects.

引用

页码：3082 / 3088

页数：7

共 20 条

[1] X-RAY TOPOGRAPHIC STUDY OF DEFECTS IN KH2PO4 SINGLE-CRYSTALS AND THEIR RELATION WITH IMPURITY SEGREGATION [J].

BELOUET, C ;

DUNIA, E ;

PETROFF, JF .

JOURNAL OF CRYSTAL GROWTH, 1974, 23 (04) :243-252

[2] DEPENDENCE OF THE DYNAMIC CENTRAL PEAK ON DEUTERIUM CONTENT IN PARA-ELECTRIC KH2PO4 [J].

BLINC, R ;

SLAK, J ;

SABARRETO, FC ;

PIRES, AST .

PHYSICAL REVIEW LETTERS, 1979, 42 (15) :1000-1003

[3] STRAIN DECORATION OF DISLOCATIONS AND THE STATIC CENTRAL PEAK IN FERROELASTIC SYSTEMS [J].

CHAVES, AS ;

BLINC, R .

PHYSICAL REVIEW LETTERS, 1979, 43 (14) :1037-1040

[4] A LIGHT-SCATTERING SURVEY OF CRITICAL-BEHAVIOR IN THE PHASE-DIAGRAM OF KH2PO4 [J].

COURTENS, E ;

GAMMON, R .

FERROELECTRICS, 1980, 24 (1-4) :19-26

[5] DISAPPEARING CENTRAL PEAK IN PARA-ELECTRIC POTASSIUM DIHYDROGEN PHOSPHATE (KDP) [J].

COURTENS, E .

PHYSICAL REVIEW LETTERS, 1978, 41 (17) :1171-1174

[6] STATICS AND DYNAMICS OF FLUCTUATION QUENCHING IN ELASTIC MEDIA UNDER AN ORDERING FORCE - APPLICATION TO LIGHT-SCATTERING IN KH2PO4 [J].

COURTENS, E ;

GAMMON, RW .

PHYSICAL REVIEW B, 1981, 24 (07) :3890-3911

[7] DEUTERIUM IMPURITIES AND RAYLEIGH CENTRAL PEAK IN HYDROGEN-BONDED FERROELECTRICS [J].

COURTENS, E .

PHYSICAL REVIEW LETTERS, 1977, 39 (09) :561-564

[8] ON THE FORMATION OF ETCH GROOVES AROUND STRESS-FIELDS DUE TO INHOMOGENEOUS IMPURITY DISTRIBUTION IN KH2PO4 SINGLE-CRYSTALS [J].

DAM, B ;

VANENCKEVORT, WJP .

JOURNAL OF CRYSTAL GROWTH, 1981, 51 (03) :607-623

[9] NATURE OF CENTRAL-PEAK LIGHT-SCATTERING IN POTASSIUM DIHYDROGEN PHOSPHATE [J].

DURVASULA, LN ;

GAMMON, RW .

PHYSICAL REVIEW LETTERS, 1977, 38 (19) :1081-1084

[10] LIGHT-SCATTERING BY DEFECTS IN TGS [J].

FOUSKOVA, A ;

PAVEL, M ;

BREZINA, B .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1984, 81 (02) :K117-K119

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