Near equiatomic FeCo nanocrystalline alloy embedded in an alumina aerogel matrix: Microstructural features and related magnetic properties

M. F. Casula; G. Concas; F. Congiu; A. Corrias; A. Falqui; G. Spano

doi:10.1021/jp0546554

Near equiatomic FeCo nanocrystalline alloy embedded in an alumina aerogel matrix: Microstructural features and related magnetic properties

M. F. Casula, G. Concas, F. Congiu, A. Corrias, A. Falqui^*, G. Spano

^*Corresponding author for this work

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

25 Scopus citations

Abstract

FeCo-Al₂O₃ nanocomposite aerogels were studied by high-resolution electron microscopy, energy filtered transmission electron microscopy, Mössbauer spectroscopy, and measurements of static magnetizations and hysteretic behavior. The combined use of such techniques provided insights on the formation of bcc FeCo nanocrystalline particles inside the alumina matrix, which is promoted by thermal treatment under hydrogen flow of the parent aerogel. Sample characteristics such as alloy composition and crystallinity, influence of the matrix on the structural evolution, and resulting magnetic properties were investigated as a. function of the temperature and time of the reduction treatment.

Original language	English (US)
Pages (from-to)	23888-23895
Number of pages	8
Journal	Journal of Physical Chemistry B
Volume	109
Issue number	50
DOIs	https://doi.org/10.1021/jp0546554
State	Published - Dec 22 2005
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Near equiatomic FeCo nanocrystalline alloy embedded in an alumina aerogel matrix: Microstructural features and related magnetic properties",

abstract = "FeCo-Al2O3 nanocomposite aerogels were studied by high-resolution electron microscopy, energy filtered transmission electron microscopy, M{\"o}ssbauer spectroscopy, and measurements of static magnetizations and hysteretic behavior. The combined use of such techniques provided insights on the formation of bcc FeCo nanocrystalline particles inside the alumina matrix, which is promoted by thermal treatment under hydrogen flow of the parent aerogel. Sample characteristics such as alloy composition and crystallinity, influence of the matrix on the structural evolution, and resulting magnetic properties were investigated as a. function of the temperature and time of the reduction treatment.",

author = "Casula, {M. F.} and G. Concas and F. Congiu and A. Corrias and A. Falqui and G. Spano",

year = "2005",

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doi = "10.1021/jp0546554",

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T1 - Near equiatomic FeCo nanocrystalline alloy embedded in an alumina aerogel matrix

T2 - Microstructural features and related magnetic properties

AU - Casula, M. F.

AU - Concas, G.

AU - Congiu, F.

AU - Corrias, A.

AU - Falqui, A.

AU - Spano, G.

PY - 2005/12/22

Y1 - 2005/12/22

N2 - FeCo-Al2O3 nanocomposite aerogels were studied by high-resolution electron microscopy, energy filtered transmission electron microscopy, Mössbauer spectroscopy, and measurements of static magnetizations and hysteretic behavior. The combined use of such techniques provided insights on the formation of bcc FeCo nanocrystalline particles inside the alumina matrix, which is promoted by thermal treatment under hydrogen flow of the parent aerogel. Sample characteristics such as alloy composition and crystallinity, influence of the matrix on the structural evolution, and resulting magnetic properties were investigated as a. function of the temperature and time of the reduction treatment.

AB - FeCo-Al2O3 nanocomposite aerogels were studied by high-resolution electron microscopy, energy filtered transmission electron microscopy, Mössbauer spectroscopy, and measurements of static magnetizations and hysteretic behavior. The combined use of such techniques provided insights on the formation of bcc FeCo nanocrystalline particles inside the alumina matrix, which is promoted by thermal treatment under hydrogen flow of the parent aerogel. Sample characteristics such as alloy composition and crystallinity, influence of the matrix on the structural evolution, and resulting magnetic properties were investigated as a. function of the temperature and time of the reduction treatment.

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JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 50

ER -

Near equiatomic FeCo nanocrystalline alloy embedded in an alumina aerogel matrix: Microstructural features and related magnetic properties

Abstract

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