Primary crystallization fields, growth features and properties of rare earth and barium-based cobaltates

被引：13

作者：

Bychkov, G. L. ^{[1
]}

Barilo, S. N. ^{[1
]}

Shiryaev, S. V. ^{[1
]}

Sheptyakov, D. V. ^{[2
,3
]}

Ustinovich, S. N. ^{[1
]}

Podlesnyak, A. ^{[2
,3
]}

Baran, M. ^{[4
]}

Szymczak, R. ^{[4
]}

Furrer, A. ^{[1
]}

机构：

[1] Natl Acad Sci, Inst Solid State & Semicond Phys, Minsk 220072, BELARUS

[2] Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[4] Polish Acad Sci, Inst Phys, PL-02688 Warsaw, Poland

来源：

JOURNAL OF CRYSTAL GROWTH | 2005年 / 275卷 / 1-2期

关键词：

Phase diagrams; Overstoichiometric flux growth; Cobaltates; Magnetic materials;

D O I：

10.1016/j.jcrysgro.2004.11.117

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

High quality single crystals of LnBaCo(2)O(5+x) (0<x<1) (Ln = Pr, Eu, Gd, Tb, Dy) were grown from overstoichiometric flux melt. In contrast, caused by significant flux melt creep and corrosion of alumina crucibles single crystals of these cobaltites with Y or Ln = La, Nd, Sm and Ho cannot be grown using similar temperature range and flux compositions. To solve this problem comprehensive studies of the phae primary crystallization fields in the corresponding quasi-ternary phase diagrams have been undertaken. For most of Ln(2)O(3)-BaO-CoO systems cocrystallization of several new phases was found. Bulk single crystals of a new cobaltate family LnBaCo(4)O(7)(Ln = Eu, Gd, Y, Dy, Tb and Tm) were grown. Comparative data on magnetic susceptibility of the grown crystals are presented. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：E813 / E818

页数：6

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