DISAPPEARANCE OF THE INFRARED SOFT MODE IN THE WEAK FERROELECTRIC LI2GE7O15

被引:11
作者
KADLEC, F [1 ]
PETZELT, J [1 ]
ZELEZNY, V [1 ]
VOLKOV, AA [1 ]
机构
[1] RUSSIAN ACAD SCI,INST GEN PHYS,MOSCOW 117942,RUSSIA
关键词
FERROELECTRICS; PHONONS; PHASE TRANSITIONS; ANHARMONICITY; LIGHT ABSORPTION AND REFLECTION;
D O I
10.1016/0038-1098(95)00149-2
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The behaviour of the soft mode in Li2Ge7O15 was studied in a wide temperature range in the transmission spectra. The fit results have been found in agreement with the phenomenological theory of weak ferroelectricity predicting vanishing infrared strength of the soft mode about 50 K below T-c.
引用
收藏
页码:725 / 729
页数:5
相关论文
共 14 条
  • [1] BUSH AA, 1986, FIZ TVERD TELA+, V28, P1970
  • [2] DIELECTRIC-DISPERSION IN LI2GE7O15
    HORIOKA, M
    SAWADA, A
    WADA, M
    [J]. FERROELECTRICS, 1989, 95 : 233 - 236
  • [3] FERRIELECTRIC BEHAVIORS IN LI2GE7O15 CRYSTALS
    SAWADA, A
    TOMATSU, M
    [J]. FERROELECTRICS, 1992, 137 (1-4) : 297 - 302
  • [4] RAMAN-STUDY OF CRITICAL FLUCTUATIONS NEAR THE PHASE-TRANSITION IN FERROELECTRIC LI2GE7O15
    SHITOV, GY
    TIMONIN, PN
    TORGASHEV, VI
    LATUSH, LT
    YUZYUK, YI
    VOLNYANSKII, MD
    [J]. PHASE TRANSITIONS, 1994, 46 (03) : 143 - 161
  • [5] SHVETZ TV, 1991, THESIS DSU DNEPROPET
  • [6] TAGANTSEV AK, 1987, IZV AN SSSR FIZ+, V51, P2082
  • [7] Tagantsev AK, 1988, FERROELECTRICS, V79, P57, DOI [10.1080/00150198808229398, DOI 10.1080/00150198808229398]
  • [8] TAGANTSEV AK, 1987, JETP LETT, V45, P352
  • [9] Torgashev V. I., COMMUNICATION
  • [10] DIELECTRIC MEASUREMENTS IN THE SUBMILLIMETER WAVELENGTH REGION
    VOLKOV, AA
    GONCHAROV, YG
    KOZLOV, GV
    LEBEDEV, SP
    PROKHOROV, AM
    [J]. INFRARED PHYSICS, 1985, 25 (1-2): : 369 - 373