Floating-zone crystal growth of perovskite manganites with colossal magnetoresistance

被引：13
|
作者：
Kloc, C
Cheong, SW
Matl, P
机构：
[1] Univ Konstanz, Fac Phys, D-78434 Constance, Germany
[2] AT&T Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
[3] Princeton Univ, Joseph Henry Labs Phys, Princeton, NJ 08544 USA
来源：
JOURNAL OF CRYSTAL GROWTH | 1998年 / 191卷 / 1-2期
关键词：
D O I：
10.1016/S0022-0248(98)00120-1
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Crystals of promising magnetoresistance materials: strontium-substituted neodymium manganite, Nd0.7Sr0.3MnO3 and calcium-substituted lanthanum manganite, La0.5Ca0.5MnO3 were grown by an optically heated floating zone technique. The vertical configuration of two ellipsoidal mirrors allows homogeneous heating of the molten zone. The similar composition of the molten zone and of the crystal or sintered rod in Nd0.7Sr0.3MnO3 system indicates that the liquidus/solidus splitting in the (Nd-Sr)-MnO3 system is very narrow, permitting use of a relatively high growth speed of 10 mm/h and growth of good-quality single crystals. In the (La-Ca)-MnO3 system, the liquidus/solidus splitting is larger, necessitating a slower growth speed and leading to more defects in the crystals. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：294 / 297
页数：4
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