Magnetic properties of γ-Fe2O3-SiO2 aerogel and xerogel nanocomposite materials

Carla Cannas; Maria F. Casula; Giorgio Concas; Anna Corrias; Dante Gatteschi; Andrea Falqui; Anna Musinu; Claudio Sangregorio; Giorgio Spano

doi:10.1039/b104562h

Magnetic properties of γ-Fe₂O₃-SiO₂ aerogel and xerogel nanocomposite materials

Carla Cannas, Maria F. Casula, Giorgio Concas, Anna Corrias, Dante Gatteschi, Andrea Falqui, Anna Musinu, Claudio Sangregorio, Giorgio Spano

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

78 Scopus citations

Abstract

The properties of aerogel and xerogel iron oxide-silica nanocomposites prepared by the sol-gel method were investigated by thermal analysis, X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy and susceptibility measurements. Pure maghemite nanoparticles were obtained starting from both xerogel and aerogel samples, with particles of average size around 5 nm which tend to aggregate into the silica matrix. The role of magnetic interparticle interactions, which have a strong influence on the magnetic properties, is discussed.

Original language	English (US)
Pages (from-to)	3180-3187
Number of pages	8
Journal	Journal of Materials Chemistry
Volume	11
Issue number	12
DOIs	https://doi.org/10.1039/b104562h
State	Published - 2001
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Materials Chemistry

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title = "Magnetic properties of γ-Fe2O3-SiO2 aerogel and xerogel nanocomposite materials",

abstract = "The properties of aerogel and xerogel iron oxide-silica nanocomposites prepared by the sol-gel method were investigated by thermal analysis, X-ray diffraction, transmission electron microscopy, M{\"o}ssbauer spectroscopy and susceptibility measurements. Pure maghemite nanoparticles were obtained starting from both xerogel and aerogel samples, with particles of average size around 5 nm which tend to aggregate into the silica matrix. The role of magnetic interparticle interactions, which have a strong influence on the magnetic properties, is discussed.",

author = "Carla Cannas and Casula, {Maria F.} and Giorgio Concas and Anna Corrias and Dante Gatteschi and Andrea Falqui and Anna Musinu and Claudio Sangregorio and Giorgio Spano",

year = "2001",

doi = "10.1039/b104562h",

language = "English (US)",

volume = "11",

pages = "3180--3187",

journal = "Journal of Materials Chemistry",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Magnetic properties of γ-Fe2O3-SiO2 aerogel and xerogel nanocomposite materials

AU - Cannas, Carla

AU - Casula, Maria F.

AU - Concas, Giorgio

AU - Corrias, Anna

AU - Gatteschi, Dante

AU - Falqui, Andrea

AU - Musinu, Anna

AU - Sangregorio, Claudio

AU - Spano, Giorgio

PY - 2001

Y1 - 2001

N2 - The properties of aerogel and xerogel iron oxide-silica nanocomposites prepared by the sol-gel method were investigated by thermal analysis, X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy and susceptibility measurements. Pure maghemite nanoparticles were obtained starting from both xerogel and aerogel samples, with particles of average size around 5 nm which tend to aggregate into the silica matrix. The role of magnetic interparticle interactions, which have a strong influence on the magnetic properties, is discussed.

AB - The properties of aerogel and xerogel iron oxide-silica nanocomposites prepared by the sol-gel method were investigated by thermal analysis, X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy and susceptibility measurements. Pure maghemite nanoparticles were obtained starting from both xerogel and aerogel samples, with particles of average size around 5 nm which tend to aggregate into the silica matrix. The role of magnetic interparticle interactions, which have a strong influence on the magnetic properties, is discussed.

UR - http://www.scopus.com/inward/record.url?scp=0035655275&partnerID=8YFLogxK

U2 - 10.1039/b104562h

DO - 10.1039/b104562h

M3 - Article

AN - SCOPUS:0035655275

SN - 0959-9428

VL - 11

SP - 3180

EP - 3187

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

IS - 12

ER -

Magnetic properties of γ-Fe₂O₃-SiO₂ aerogel and xerogel nanocomposite materials

Abstract

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