Point defects in langatate crystals

被引：12

作者：

Kuz'micheva, G. M. ^{[1
]}

Zaharko, O. ^{[2
]}

Tyunina, E. A. ^{[1
]}

Rybakov, V. B. ^{[3
]}

Kaurova, I. A. ^{[1
]}

Domoroshchina, E. N. ^{[1
]}

Dubovsky, A. B. ^{[4
]}

机构：

[1] Lomonosov State Acad Fine Chem Technol, Moscow 119571, Russia

[2] Paul Scherrer Inst, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[3] Moscow MV Lomonosov State Univ, Moscow 119992, Russia

[4] All Russia Res Inst Synth Mineral Raw Mat, Aleksandrov 601600, Vladimirskaya O, Russia

来源：

CRYSTALLOGRAPHY REPORTS | 2009年 / 54卷 / 02期

关键词：

DIFFRACTION; GROWTH;

D O I：

10.1134/S1063774509020163

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Langatate crystals of the general composition La-3(Ga0.5Ta0.5)Ga5O14, grown by the Czochralski method, have been investigated by neutron diffraction (single crystals) and X-ray diffraction (ground single crystals). The crystals were grown in an atmosphere of 99% Ar + 1% O-2 in the Y54A degrees direction (rotation by 54A degrees with respect to the y axis), without subsequent annealing (orange crystal) or with vacuum annealing (colorless crystal). It is established that colorless crystals have a higher gallium content and, therefore, a larger number of oxygen vacancies in comparison with colored crystals; this is a possible reason for their lower microhardness.

引用

页码：279 / 282

页数：4

共 14 条

[1] Optical properties of lanthanum-gallium tantalate at different growth and post-growth treatment conditions
Buzanov, O. A.
Zabelina, E. V.
Kozlova, N. S.
[J]. CRYSTALLOGRAPHY REPORTS, 2007, 52 (04) : 691 - 696
[2] Domoroshchina E N, 2004, PERSPECTIVNYE MAT, V4, P17
[3] DOMOROSHCHINA EN, 2005, THESIS MOSCOW
[4] [Кузьмичева Г.М. Kuz'micheva G.M.], 2005, [Неорганические материалы, Neorganicheskie materialy], V41, P485
[5] Neutron Diffraction and X-Ray Diffraction Investigations of Langasite Crystals
Kuz'micheva, G. M.
Zakharko, O.
Tyunina, E. A.
Rybakov, V. B.
Domoroshchina, E. N.
Dubovskii, A. B.
[J]. CRYSTALLOGRAPHY REPORTS, 2008, 53 (06) : 989 - 994
[6] A family of langasite: growth and structure
Kuzmicheva, G. M.
Domoroschina, E. N.
Rybakov, V. B.
Dubovsky, A. B.
Tyunina, E. A.
[J]. JOURNAL OF CRYSTAL GROWTH, 2005, 275 (1-2) : E715 - E719
[7] Langasite-type materials: From discovery to present state
Mill, BV
Pisarevsky, YV
[J]. PROCEEDINGS OF THE 2000 IEEE/EIA INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM & EXHIBITION, 2000, : 133 - 144
[8] Elastic and piezoelectric properties of La3Ga5SiO14 and La3Ga5.5Ta0.5O14:: An application of resonant ultrasound spectroscopy
Schreuer, J
[J]. IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, 2002, 49 (11) : 1474 - 1479
[9] REVISED EFFECTIVE IONIC-RADII AND SYSTEMATIC STUDIES OF INTERATOMIC DISTANCES IN HALIDES AND CHALCOGENIDES
SHANNON, RD
[J]. ACTA CRYSTALLOGRAPHICA SECTION A, 1976, 32 (SEP1): : 751 - 767
[10] A short history of SHELX
Sheldrick, George M.
[J]. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 2008, 64 : 112 - 122

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