RAMAN-SCATTERING STUDY OF INCOMMENSURATE PHASE-TRANSITIONS IN LA2TI2O7

被引：9

作者：

OHI, K

ISHII, S

OMURA, H

机构：

[1] Department of Physics, School of Science and Engineering, Waseda University, Tokyo, 169, 3-4-1 Okubo, Shinjuku-ku

[2] Fuji Photo Film Co., Ltd.

来源：

FERROELECTRICS | 1992年 / 137卷 / 1-4期

关键词：

D O I：

10.1080/00150199208015945

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman spectra of LaTi2O7 have been measured around the phase transitions at 983 K and 1053 K. The asymmetric lines appeared at about 50 cm-1 in the temperature range from about 673 K to 1053 K. The results are explained by a coupled modes model. One mode becomes soften and broad toward 1053 K.

引用

页码：133 / 138

页数：6

共 14 条

[1]

BAKER AS, 1964, PHYS REV, V135, pA1732

[2] COMPOUNDS WITH PEROVSKITE-TYPE SLABS .5. A HIGH-TEMPERATURE MODIFICATION OF LA2TI2O7 [J].

ISHIZAWA, N ;

MARUMO, F ;

IWAI, S ;

KIMURA, M ;

KAWAMURA, T .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1982, 38 (FEB) :368-372

[3]

ISHIZAWA N, 1977, ANN M MINERAL SOC JA, P68

[4] FERROELECTRIC SOFT MODE IN SR2NB2O7 [J].

JANG, MS ;

KOJIMA, S ;

OHI, K ;

NAKAMURA, T .

FERROELECTRICS, 1981, 38 (1-4) :837-840

[5] PROTON-PHONON COUPLING IN CSH2ASO4 AND KH2ASO4 [J].

KATIYAR, RS ;

RYAN, JF ;

SCOTT, JF .

PHYSICAL REVIEW B, 1971, 4 (08) :2635-&

[6] OPTICAL-MODE SOFTENING IN THE INCOMMENSURATE PHASE OF SR2NB2O7 [J].

KOJIMA, S ;

TAKASHIGE, M ;

NAKAMURA, T ;

KAKINUMA, H .

SOLID STATE COMMUNICATIONS, 1979, 31 (10) :755-757

[7] SOFT OPTIC PHONON RESPONSIBLE FOR THE STRUCTURAL PHASE-TRANSITION IN SR2TA2O7 AT 170-DEGREES-C [J].

KOJIMA, S ;

OHI, K ;

NAKAMURA, T .

SOLID STATE COMMUNICATIONS, 1980, 35 (01) :79-81

[8]

KOJIMA S, 1980, J PHYS SOC JPN S95, V49, P95

[9]

KOJIMA S, 1980, J PHYS SOC JPN, V50, P2787

[10] NEW FERROELECTRIC - LA2TI207 [J].

NANAMATSU, S ;

KIMURA, M ;

DOI, K ;

MATSUSHITA, S ;

YAMADA, N .

FERROELECTRICS, 1974, 8 (1-2) :511-513

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