Mössbauer studies on ultraporous Fe-Oxide/SiO2 aerogel

A. Lančok; K. Závěta; M. Popovici; C. Savii; M. Gich; A. Roig; E. Molins; K. Barčová

doi:10.1007/s10751-006-9266-9

Mössbauer studies on ultraporous Fe-Oxide/SiO2 aerogel

A. Lančok, K. Závěta, M. Popovici, C. Savii, M. Gich, A. Roig, E. Molins, K. Barčová

Department of Geology

Research output: Contribution to journal › Article › Research › peer-review

2 Citations (Scopus)

Abstract

Magnetic aerogels with very low volume density of ~0.2 g/cm3 were prepared by sol-gel method and supercritical drying. The resulting materials were monolithic and displayed high surface area. By X-ray diffraction and Mössbauer spectroscopy the crystalline phase formed inside the mesopores of the SiO2 matrix was identified as a spinel iron oxide. Comparison of the magnetic measurements with Mössbauer spectra at various temperatures contributed to the elucidation of the magnetic state of this nanocomposite system with restricted magnetic interactions, in particular its transition to a superparamagnetic state. © Springer Science + Business Media B.V. 2006.

Original language	English
Pages (from-to)	203-208
Journal	Hyperfine Interactions
Volume	165
Issue number	1-4
DOIs	https://doi.org/10.1007/s10751-006-9266-9
Publication status	Published - 1 Sept 2005

Keywords

Aerogels
Fe O 2 3
Mössbauer spectroscopy
Nanoparticles
Superparamagnetic state

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10.1007/s10751-006-9266-9

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title = "M{\"o}ssbauer studies on ultraporous Fe-Oxide/SiO2 aerogel",

abstract = "Magnetic aerogels with very low volume density of ~0.2 g/cm3 were prepared by sol-gel method and supercritical drying. The resulting materials were monolithic and displayed high surface area. By X-ray diffraction and M{\"o}ssbauer spectroscopy the crystalline phase formed inside the mesopores of the SiO2 matrix was identified as a spinel iron oxide. Comparison of the magnetic measurements with M{\"o}ssbauer spectra at various temperatures contributed to the elucidation of the magnetic state of this nanocomposite system with restricted magnetic interactions, in particular its transition to a superparamagnetic state. {\textcopyright} Springer Science + Business Media B.V. 2006.",

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author = "A. Lan{\v c}ok and K. Z{\'a}v{\v e}ta and M. Popovici and C. Savii and M. Gich and A. Roig and E. Molins and K. Bar{\v c}ov{\'a}",

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T1 - Mössbauer studies on ultraporous Fe-Oxide/SiO2 aerogel

AU - Lančok, A.

AU - Závěta, K.

AU - Popovici, M.

AU - Savii, C.

AU - Gich, M.

AU - Roig, A.

AU - Molins, E.

AU - Barčová, K.

PY - 2005/9/1

Y1 - 2005/9/1

N2 - Magnetic aerogels with very low volume density of ~0.2 g/cm3 were prepared by sol-gel method and supercritical drying. The resulting materials were monolithic and displayed high surface area. By X-ray diffraction and Mössbauer spectroscopy the crystalline phase formed inside the mesopores of the SiO2 matrix was identified as a spinel iron oxide. Comparison of the magnetic measurements with Mössbauer spectra at various temperatures contributed to the elucidation of the magnetic state of this nanocomposite system with restricted magnetic interactions, in particular its transition to a superparamagnetic state. © Springer Science + Business Media B.V. 2006.

AB - Magnetic aerogels with very low volume density of ~0.2 g/cm3 were prepared by sol-gel method and supercritical drying. The resulting materials were monolithic and displayed high surface area. By X-ray diffraction and Mössbauer spectroscopy the crystalline phase formed inside the mesopores of the SiO2 matrix was identified as a spinel iron oxide. Comparison of the magnetic measurements with Mössbauer spectra at various temperatures contributed to the elucidation of the magnetic state of this nanocomposite system with restricted magnetic interactions, in particular its transition to a superparamagnetic state. © Springer Science + Business Media B.V. 2006.

KW - Aerogels

KW - Fe O 2 3

KW - Mössbauer spectroscopy

KW - Nanoparticles

KW - Superparamagnetic state

U2 - 10.1007/s10751-006-9266-9

DO - 10.1007/s10751-006-9266-9

M3 - Article

VL - 165

SP - 203

EP - 208

IS - 1-4

ER -

Mössbauer studies on ultraporous Fe-Oxide/SiO2 aerogel

Abstract

Keywords

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