Crystal growth and characterization of Marokite CaMn2O4+δ

被引：24

作者：

White, B. D. ^{[1
]}

dos Santos, C. A. M. ^{[1
,2
]}

Souza, J. A. ^{[1
]}

McClellan, K. J. ^{[3
]}

Neumeier, J. J. ^{[1
]}

机构：

[1] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

[2] USP, Escola Engn Lorena, BR-12602810 Lorena, SP, Brazil

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

JOURNAL OF CRYSTAL GROWTH | 2008年 / 310卷 / 14期

基金：

美国国家科学基金会;

关键词：

characterization; floating zone technique; single-crystal growth; manganites;

D O I：

10.1016/j.jcrysgro.2008.04.005

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Centimeter-sized single crystals of CaMn2O4+delta, commonly known as Marokite, were grown using the floating-zone method. The growth conditions are reported along with a discussion of a simple method for polycrystalline rod preparation, which differs from the typical cold isostatic pressure procedure. Crystal characterization was determined by powder X-ray diffraction, back-reflection Laue diffraction, iodometric titration, energy-dispersive X-ray spectrometry, and vibrating sample magnetometry. Polycrystalline rods, composed of stoichiometric Marokite, were found to produce crystals with CaMnO3 as a secondary impurity phase as revealed by magnetic measurements and powder diffraction. Crystals grown from polycrystalline rods with excess manganese oxide produced single crystals of high quality without impurity phases. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：3325 / 3330

页数：6

共 22 条

[1] OXYGEN-CONTENT OF SUPERCONDUCTING PEROVSKITES, LA2-XSRXCUOY AND YBA2CU3OY [J].