Influence of synthesis method on the microstructure of Sr3-xLaxMn2O7:: a combined HREM, EELS and X-ray study

被引：6

作者：

Caldes, MT ^{[1
]}

Goglio, G ^{[1
]}

Marhic, C ^{[1
]}

Joubert, O ^{[1
]}

Lancin, M ^{[1
]}

Brohan, L ^{[1
]}

机构：

[1] Inst Mat Jean Rouxel, UMR 6502, F-44322 Nantes 03, France

来源：

INTERNATIONAL JOURNAL OF INORGANIC MATERIALS | 2001年 / 3卷 / 08期

关键词：

oxides; electron energy loss spectroscopy (EELS); electron microscopy; defects; microstructure;

D O I：

10.1016/S1466-6049(01)00116-7

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The relationship between synthesis method and type of intergrowth defects observed in the Sr3-xLaxMn2O7 series (1 less than or equal to x less than or equal to 1.35) with nominal composition has been studied. Self-combustion and ceramic methods were used to prepare the samples. For the same Sr/La ratio, several kinds of intergrowth defects are usually observed in samples prepared by self-combustion, whereas in samples prepared by the ceramic method, their existence is quite unusual. Moreover, the number of K2NiF4-type defects decreases when the La content increases. An EELS study of Mn L-2.3 edges, performed either on the 2D phase or on the defects, has shown a homogeneity of the samples with respect to the Mn3+/Mn4+ ratio. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1169 / 1171

页数：3