HIGH-TEMPERATURE RAMAN SCATTERING IN SM0.8LA0.2ALO3 COMPOUND - RELATION TO THE PHASE-TRANSITION IN RARE-EARTH ORTHOALUMINATES

被引：7

作者：

ALAIN, P

COUTURES, JP

PIRIOU, B

机构：

[1] CTR RECH PHYS HAUTES TEMP,CNRS,F-45045 ORLEANS,FRANCE

[2] LAB ULTRA REFRACTAIRES,CNRS,F-66120 ODEILLO,FRANCE

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 1979年 / 8卷 / 02期

关键词：

D O I：

10.1002/jrs.1250080205

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Raman spectra of molten Sm0.8La0.2AlO3 have been recorded from room temperature to 1470 K. Experimental results show that a first‐order phase transition occurs at 580 K and that two phonon modes appear very unstable in the high temperature phase. Comparison with Raman data obtained on rare earth aluminate single crystals indicates that these ‘soft’ modes may be associated with a rhombohedral to cubic phase transition. Copyright © 1979 Heyden & Son Ltd.

引用

页码：88 / 91

页数：4

共 9 条

[1]

ALAIN P, 1975, REV INT HAUTES TEMP, V12, P35

[2]

ALAIN P, 1975, SOLID STATE COMMUN, V10, P35

[3]

ALAIN P, 1977, J PHYS PARIS, V38, pC7

[4]

FAUCHER M, 1970, AM CERAM SOC BULL, V49, P707

[5]

FAUCHER M, COMMUNICATION

[6] CRYSTALLOGRAPHIC STUDIES OF PEROVSKITE-LIKE COMPOUNDS .2. RARE EARTH ALUMINATES [J].

GELLER, S ;

BALA, VB .

ACTA CRYSTALLOGRAPHICA, 1956, 9 (11) :1019-1025

[7] CRYSTAL-STRUCTURES OF ORTHORHOMBIC SMALO3 AND OF TRIGONAL NDALO3 [J].

MAREZIO, M ;

DERNIER, PD ;

REMEIKA, JP .

JOURNAL OF SOLID STATE CHEMISTRY, 1972, 4 (01) :11-&

[8]

SCOTT JF, 1969, PHYS REV, V3, P823

[9]

SCOTT JF, 1970, PHYS REV B, V10, P4182

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