Diffraction studies of the crystalline and magnetic structures of γ-Fe2O3 iron oxide nanostructured in porous glass

被引：13

作者：

Golosovsky, IV ^{[1
]}

Tovar, M

Hoffman, U

Mirebeau, I

Fauth, F

Kurdyukov, DA

Kumzerov, YA

机构：

[1] Russian Acad Sci, Petersburg Nucl Phys Inst, Gatchina 188300, Leningrad Reg, Russia

[2] Hahn Meitner Inst Berlin GmbH, Berliner Zentrum Neutronenstreuung, D-14109 Berlin, Germany

[3] CE Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[4] European Synchrotron Radiat Facil, F-38043 Grenoble 9, France

[5] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia

来源：

JETP LETTERS | 2006年 / 83卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S0021364006070083

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The crystalline and magnetic structures of gamma Fe2O3 maghemite synthesized in porous glass in the form of nanoparticles with a mean diameter of 106(2) angstrom have been determined by the neutrons and synchrotron radiation diffraction methods. Nanostructured maghemite with the spinel structure has vacancies in the octahedral and tetrahedral positions. The magnetic structure corresponds to the usual ferrimagnetic type. The measured magnetic moments are much lower than the moments in a usual sample. Moreover, the moments are strongly different in the octahedral and tetrahedral positions; this difference is explained by the difference in the exchange interaction for moments in different positions.

引用

页码：298 / 301

页数：4

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