Structural analysis of co-precipitated Sr1-xLaxFe12-xCOxO19 powders

被引：21

作者：

Le Breton, JM ^{[1
]}

Lechevallier, L

Wang, HF

Harris, R

机构：

[1] Univ Rouen, CNRS, UMR 6634, Grp Phys Mat, F-76801 St Etienne, France

[2] Univ Cegry Pontoise, Lab Phys Mat & Surface, F-95031 Cergy Pontoise, France

[3] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

SrFe12O19; hexaferrites; La-Co substitution; Mossbauer spectroscopy;

D O I：

10.1016/j.jmmm.2003.12.1201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Sr1-xLaxFe12-xCoxO19 (x = 00.4) powders produced by chemical co-precipitation were investigated by Mossbauer spectrometry and X-ray diffraction. The results show that the powders are not single hexagonal M-type phase, (La,Sr)(Fe,Co)O3-delta (mainly) and (Co,Fe)Fe2O4 (traces) being present in the substituted powders, with a proportion that increases with x. The Mossbauer spectra were fitted with a model that accounts for the presence of the secondary phases. The interpretation of the Mossbauer data shows that in the hexagonal M-type phase, La3+ and Co2+ are substituted for Sr2+ and Fe3+ respectively, with a content that is lower than the nominal content, due to the formation of the secondary phases. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：2214 / 2215

页数：2

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