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Magnetic Nanoparticles in MCM-41 Type Mesoporous Silica

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Surowiec Z., Bierska-Piech B., Wiertel M., Budzyński M., Goworek J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6
1605-1613
EN
Structural phase transformations and magnetic properties of mesoporous MCM-41 template modified with iron and nickel salts were studied by nitrogen physisorption, X-ray diffraction, Mössbauer spectroscopy and transmission electron microscopy. The FeNi-oxide or the bimetallic crystal structure is formed for low and high Ni concentrations, respectively. The average size of nanoparticles is about 10 nm. About 70% of particles exist in a superparamagnetic state at room temperature.
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