Anomalous Temperature Dependence of Piezo-Optic Birefrigence in Li2Ge7O15 Crystals

被引：1

作者：

Bain, A. K. ^{[1
]}

Chand, Prem ^{[1
]}

Rao, K. Veerabhadra ^{[2
]}

Yamaguchi, T. ^{[3
]}

Wada, M. ^{[4
]}

机构：

[1] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India

[2] Indian Inst Technol, Adv Ctr Mat Sci, Kanpur 208016, Uttar Pradesh, India

[3] Meisei Univ, Fac Sci & Technol, Hiono 191, Japan

[4] Shinshu Univ, Fac Sci, Matsumoto, Nagano 390, Japan

来源：

FERROELECTRICS | 2009年 / 386卷

关键词：

Lithium heptagermanate; Weak ferroelectric; photoelastic coefficients; phase transition; piezo-optic hysteresis; FERROELECTRIC PHASE-TRANSITION; ORTHORHOMBIC LI2GE7O15; SOFT MODE;

D O I：

10.1080/00150190902961918

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Peaks are observed in the temperature dependences of the photoelastic coefficients C-zx and C-zy at temperatures similar to 279 K. These are attributed to the occurrence of paraelectric to ferroelectric phase transition and the spontaneous polarization along c-axis of the crystals Li2Ge7O15. A thermal hysteresis is observed in a cooling and a heating cycle besides a valley around 289 K. The results are interpreted in terms of the soft mode and relaxational mode related to the phase transition. The phase transition temperature appears to shift linearly downwards with the increase in the uniaxial stress along the crystallographic c-axis.

引用

页码：152 / 160

页数：9

共 18 条

[1] Bain A.K., 1994, THESIS DNIEPROPETROV
[2] Piezooptic behaviour of Li2Ge7O15 crystals
Bain, AK
Rao, KV
Chand, P
Yamaguchi, T
Wada, M
[J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1998, 37 (10): : 5618 - 5619
[3] Determination of the photoelastic coefficients in lithium heptagermanate crystals
Bain, AK
Chand, P
Rao, KV
Yamaguchi, T
Wada, M
[J]. FERROELECTRICS, 1998, 209 (3-4) : 553 - 559
[4] Basun S. A., 1993, Ferroelectrics, V143, P163, DOI 10.1080/00150199308008325
[5] ELASTIC AND THERMOELASTIC CONSTANTS OF TRIGLYCINE SULFATE (TGS) IN PARAELECTRIC PHASE
HAUSSUHL, S
ALBERS, J
[J]. FERROELECTRICS, 1977, 15 (1-2) : 73 - 75
[6] GROWTH, ELASTIC PROPERTIES AND PHASE-TRANSITION OF ORTHORHOMBIC LI2GE7O15
HAUSSUHL, S
WALLRAFEN, F
RECKER, K
ECKSTEIN, J
[J]. ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1980, 153 (3-4): : 329 - 337
[7] FARADAY-EFFECT AND BIREFRINGENCE IN ORTHORHOMBIC LI2GE7O15 NEAR THE FERROELECTRIC PHASE-TRANSITION
KAMINSKY, W
HAUSSUHL, S
[J]. FERROELECTRICS LETTERS SECTION, 1990, 11 (03) : 63 - 67
[8] Kudzin A. Yu., 1995, Ferroelectrics, V164, P319, DOI 10.1080/00150199508244832
[9] KUDZIN YU, 1994, PHYS SOLID STATE, V36, P228
[10] Lines M. E., 2004, PRINCIPLES APPL FERR

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