Raman studies of ferroelectric domain walls in lithium tantalate and niobate

被引：33

作者：

Capek, Pavel ^{[1
]}

Stone, Greg ^{[1
]}

Dierolf, Volkmar ^{[1
]}

Althouse, Chad ^{[2
]}

Gopolau, Venkat ^{[2
]}

机构：

[1] Lehigh Univ, Dept Phys, 16 Mem Dr, Bethlehem, PA 18015 USA

[2] Penn State Univ, Mat Sci & Engn, University Pk, PA 16802 USA

来源：

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4, NO 3 | 2007年 / 4卷 / 03期

关键词：

D O I：

10.1002/pssc.200673720

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using confocal Raman spectroscopy at low temperature we investigated the perturbation of the phonon modes across a domain wall region as a function of sample stoichiometry in lithium tantalate and niobate. For all samples, we found that the Raman spectra were changed. The intensity of the A(LO) phonon modes and most of the E(TO) phonon modes were shifted and changed in their relative intensity over a 20 mu m length scale. Our measurements suggest that the intensity of the A(LO) phonon modes change due to local charges induced by pyroelectric effect and/or photoionization, while the observed shifts are due to strains that are not relaxed in the domain wall region. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：830 / +

页数：2

共 14 条

[1] Ferroelectric domain imaging by defect-luminescence microscopy [J].

Dierolf, V ;

Sandmann, C ;

Kim, S ;

Gopalan, V ;

Polgar, K .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (04) :2295-2297

[2] Long-range strains and the effects of applied field at 180° ferroelectric domain walls in lithium niobate -: art. no. 064113 [J].

Jach, T ;

Kim, S ;

Gopalan, V ;

Durbin, S ;

Bright, D .

PHYSICAL REVIEW B, 2004, 69 (06)

[3] TEMPERATURE DEPENDENCE OF RAMAN AND RAYLEIGH SCATTERING IN LINBO3 AND LITAO3 [J].

JOHNSTON, WD ;

KAMINOW, IP .

PHYSICAL REVIEW, 1968, 168 (03) :1045-+

[4] QUANTITATIVE DETERMINATION OF SOURCES OF ELECTRO-OPTIC EFFECT IN LINBO3 AND LITAO3 [J].

KAMINOW, IP ;

JOHNSTON, WD .

PHYSICAL REVIEW, 1967, 160 (03) :519-&

[5] Direct x-ray synchrotron imaging of strains at 180° domain walls in congruent LiNbO3 and LiTaO3 crystals [J].

Kim, S ;

Gopalan, V ;

Steiner, B .

APPLIED PHYSICS LETTERS, 2000, 77 (13) :2051-2053

[6] Raman spectroscopy as a probe of the rare-earth ions location in LiNbO3 crystals [J].

Mouras, R ;

Bourson, P ;

Fontana, MD ;

Boulon, G .

OPTICS COMMUNICATIONS, 2001, 197 (4-6) :439-444

[7] First-principles investigation of 180 degrees domain walls in BaTiO3 [J].

Padilla, J ;

Zhong, W ;

Vanderbilt, D .

PHYSICAL REVIEW B, 1996, 53 (10) :R5969-R5973

[8] The composition dependence of the Raman spectrum and new assignment of the phonons in LiNbO3 [J].

Ridah, A ;

Bourson, P ;

Fontana, MD ;

Malovichko, G .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (44) :9687-9693

[9] Relaxation of Raman polarisation rules in H:LiNbO3 [J].

Savova, I ;

Kircheva, P ;

Savatinova, I .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2005, 80 (05) :1117-1122

[10] Efficient cascaded difference frequency conversion in periodically poled Ti:LiNbO3 waveguides using pulsed and cw pumping [J].

Schreiber, G ;

Suche, H ;

Lee, YL ;

Grundkötter, W ;

Quiring, V ;

Ricken, R ;

Sohler, W .

APPLIED PHYSICS B-LASERS AND OPTICS, 2001, 73 (5-6) :501-504

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