Growth of Sr2/3Ln1/3FeO3 (Ln = La, Pr, and Nd) single crystals by the floating zone technique

被引：33

作者：

Blasco, J. ^{[1
]}

Sanchez, M. C. ^{[1
]}

Garcia, J. ^{[1
]}

Stankiewicz, J. ^{[1
]}

Herrero-Martin, J. ^{[2
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[2] European Synchrotron Radiat Facil, F-38042 Grenoble, France

来源：

JOURNAL OF CRYSTAL GROWTH | 2008年 / 310卷 / 13期

关键词：

floating zone technique; ferrites; oxides; perovskites; metal-insulator transition;

D O I：

10.1016/j.jcrysgro.2008.03.021

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We report the growth of Sr(2/3)Ln(1/3)FeO(3) single crystals (Ln = La, Pr, and Nd) by means of a floating zone melting method under a moderately high oxygen pressure (2-3 bar). We find that the boules are free of impurities or secondary phases but single crystals are only obtained using low growing rates. The La-based compounds crystallize in a rhombohedral structure, whereas crystals with Pr and Nd are orthorhombic. The as-grown crystals, which are oxygen deficient, exhibit smeared magnetic and resistive transitions upon cooling. The annealing at high oxygen pressure restores oxygen stoichiometry. The oxidized crystals show sharp resistive and magnetic transitions. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：3247 / 3250

页数：4

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