RAMAN-SCATTERING FROM SOFT PHONONS IN NDP5O14

被引：21

作者：

UNGER, WK

机构：

[1] Department of Physics, Simon Fraser University, Burnaby

来源：

SOLID STATE COMMUNICATIONS | 1979年 / 29卷 / 08期

关键词：

D O I：

10.1016/0038-1098(79)90673-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Raman spectra of NdP5O14 were recorded between 4.2 and 600 K and analyzed. The monoclinic-orthorhombic phase transition temperature was determined to be 420 K by measuring the energy of an Ag-B2g and a Bg-B3g soft optic phonon mode as a function of temperature (symmetries refer to the monoclinic and orthorhombic phase, respectively). Coupling of these optic phonons to the soft acoustical phonon which is associated with the phase transition is discussed. © 1979.

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页码：601 / 605

页数：5

相关论文

共 15 条

[1] DETERMINATION OF STATE PARAMETERS AND FORMULATION OF SPONTANEOUS STRAIN FOR FERROELASTICS [J].

AIZU, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1970, 28 (03) :706-&

[2] PHENOMENOLOGICAL LATTICE-DYNAMICAL THEORY OF FERROELASTICITY [J].

AIZU, K .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1971, 32 (08) :1959-&

[3] CRYSTAL-STRUCTURE OF LASER MATERIAL NDP5O14 [J].

ALBRAND, KR ;

ATTIG, R ;

FENNER, J ;

JESER, JP ;

MOOTZ, D .

MATERIALS RESEARCH BULLETIN, 1974, 9 (02) :129-140

[4] SOFT-MODES IN DISPLACIVE TRANSITIONS [J].

AUBRY, S ;

PICK, R .

JOURNAL DE PHYSIQUE, 1971, 32 (8-9) :657-&

[5] FERROELASTIC BEHAVIOR OF NDXLA1-XP5O14 CRYSTALS [J].

BUDIN, JP ;

MILATOSROUFOS, A ;

DUCHINH, N ;

LEROUX, G .

JOURNAL OF APPLIED PHYSICS, 1975, 46 (07) :2867-2872

[6] LATTICE MODES IN FERROELECTRIC PEROVSKITES - PBTIO3 [J].

BURNS, G ;

SCOTT, BA .

PHYSICAL REVIEW B, 1973, 7 (07) :3088-3101

[7] SOFT MODES IN FERROELASTIC LAP5O14 AND NDP5O14 [J].

FOX, DL ;

SCOTT, JF ;

BRIDENBAUGH, PM .

SOLID STATE COMMUNICATIONS, 1976, 18 (01) :111-113

[8] RAMAN EFFECT IN CRYSTALS [J].

LOUDON, R .

ADVANCES IN PHYSICS, 1964, 13 (52) :423-&

[9] SOFT OPTICAL PHONON IN FERROELASTIC BIVO4 [J].

PINCZUK, A ;

BURNS, G ;

DACOL, FH .

SOLID STATE COMMUNICATIONS, 1977, 24 (02) :163-165

[10] HIGH-TEMPERATURE PHASE OF NDP5O14 [J].

SCHULZ, H ;

THIEMANN, KH ;

FENNER, J .

MATERIALS RESEARCH BULLETIN, 1974, 9 (11) :1525-1530