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Small-angle neutron scattering measurements with polarised neutrons on Fe-Ag magnetic granular systems

被引：4
作者：
Spizzo, F [1 ]
Angeli, E
Bisero, D
Da Re, A
Ronconi, F
Vavassori, P
Bergenti, I
Deriu, A
Hoell, A
机构：
[1] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy
[2] Univ Ferrara, INFM, I-44100 Ferrara, Italy
[3] Univ Parma, Dipartimento Fis, I-43100 Parma, Italy
[4] Univ Parma, INFM, I-43100 Parma, Italy
[5] Hahn Meitner Inst Berlin GmbH, D-1000 Berlin, Germany
来源：
JOURNAL OF APPLIED CRYSTALLOGRAPHY | 2003年 / 36卷 / 01期
关键词：
small-angle scattering; polarised neutrons; Fe-Ag granular samples; giant magnetoresistance;
D O I：
10.1107/S0021889803000657
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Different Fe-Ag magnetic granular samples have been prepared by changing the relative Fe volume concentration. The evolution of their morphology with iron concentration has been studied by small angle scattering measurements performed with polarised neutrons. The particles average size determined from nuclear scattering data is about 7 Angstrom and it does not change with varying Fe content. On the other hand, the shapes of nuclear and magnetic scattering curves are different in the range of sizes corresponding to magnetic particles, indicating that similar structures display different magnetic behaviours. Finally, the analysis of polarised neutron data suggests the existence of Fe rich regions with negligible magnetisation.
引用
收藏
页码：826 / 828
页数：3
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