Ordered Nanoporous Silica Modified with Nanoparticles of Lanthanide Oxides

• Authors: A. Zeleňáková , O. Kapusta , V. Zeleňák
• Languages of publication: EN

Abstracts

EN

Lanthanide oxide nanoparticles were encapsulated inside of pores of highly ordered periodic silica of SBA15 type with hexagonal symmetry. The magnetic properties of such nanoperticles were investigated. The structural characterization using the SAXS, XANES, XRD, and N_{2} adsorption measurements showed the presence of lanthanide oxides of Ln_{2}O_{3} type (Ln=La, Pr, Nd, Gd, Eu), with the size of about 5 nm, incorporated in nanoporous channel system. Their magnetic properties, studied by SQUID apparatus, showed the weak antiferromagnetic ordering at 2 K in the nanocomposites Gd_{2}O_{3}@SBA15, Pr_{2}O_{3}@SBA15 and Nd_{2}O_{3}@SBA15. This behaviour of the nanoparticles is caused by blocking process of magnetic moments, which at 300 K exhibit the superparamagnetism, evidenced from ZFC/FC magnetization.

Keywords

EN

75.75.Fk; 81.05.Rm; 75.40.Cx

Discipline

• 75.40.Cx: Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
• 81.05.Rm: Porous materials; granular materials(for granular superconductors, see 74.81.Bd)
• 75.75.Fk: Domain structures in nanoparticles

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 1
• Pages: 218-219

Dates

published

2014-07

Contributors

author

A. Zeleňáková

• Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

O. Kapusta

• Institute of Chemistry, Faculty of Sciences, P.J. Šafárik University, Moyzesova 11, 041 54 Košice, Slovakia

author

V. Zeleňák

• Institute of Chemistry, Faculty of Sciences, P.J. Šafárik University, Moyzesova 11, 041 54 Košice, Slovakia

References

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Identifiers

DOI

10.12693/APhysPolA.126.218