The Composition and Magnetic Structure of Fe3O4/γ-Fe2O3 Core–Shell Nanocomposites at 300 and 80 K: Mössbauer Study (Part I)

A. S. Kamzin; I. M. Obaidat; A. A. Valliulin; V. G. Semenov; I. A. Al-Omari

doi:10.1134/S1063783420100157

The Composition and Magnetic Structure of Fe₃O₄/γ-Fe₂O₃ Core–Shell Nanocomposites at 300 and 80 K: Mössbauer Study (Part I)

A. S. Kamzin, I. M. Obaidat, A. A. Valliulin, V. G. Semenov, I. A. Al-Omari

Department of Physics

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

7 Citations (Scopus)

Abstract

Abstract: The magnetic structure and the composition of Fe₃O₄/γ-Fe₂O₃ nanoparticles are studied at 300 and 80 K with Mössbauer spectroscopy. We found that the Fe₃O₄/γ-Fe₂O₃ particles are a core–shell nanocomposite (NC), in which magnetite Fe₃O₄ is covered with a maghemite shell (γ-Fe₂O₃). We showed that the thickness of the maghemite shell (γ-Fe₂O₃) depends on synthesis technology. We found that a layer, whose magnetic structure differs from that of the inner part of the shell (γ-Fe₂O₃), is formed on the surface of the maghemite shell (γ-Fe₂O₃) in the Fe₃O₄/γ-Fe₂O₃ NC. An intermediate layer is formed in the spin-glass state between the core and the shell. The data on structure of core–shell nanocomposites open up prospects to explain the properties of such particles, which are of great interest to use in various fields, including biomedicine.

Original language	English
Pages (from-to)	1933-1943
Number of pages	11
Journal	Physics of the Solid State
Volume	62
Issue number	10
DOIs	https://doi.org/10.1134/S1063783420100157
Publication status	Published - Oct 1 2020

Keywords

biomedicine
core–shell magnetic composites
magnetic nanocomposites
magnetic nanoparticles

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1134/S1063783420100157

Cite this

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title = "The Composition and Magnetic Structure of Fe3O4/γ-Fe2O3 Core–Shell Nanocomposites at 300 and 80 K: M{\"o}ssbauer Study (Part I)",

abstract = "Abstract: The magnetic structure and the composition of Fe3O4/γ-Fe2O3 nanoparticles are studied at 300 and 80 K with M{\"o}ssbauer spectroscopy. We found that the Fe3O4/γ-Fe2O3 particles are a core–shell nanocomposite (NC), in which magnetite Fe3O4 is covered with a maghemite shell (γ-Fe2O3). We showed that the thickness of the maghemite shell (γ-Fe2O3) depends on synthesis technology. We found that a layer, whose magnetic structure differs from that of the inner part of the shell (γ-Fe2O3), is formed on the surface of the maghemite shell (γ-Fe2O3) in the Fe3O4/γ-Fe2O3 NC. An intermediate layer is formed in the spin-glass state between the core and the shell. The data on structure of core–shell nanocomposites open up prospects to explain the properties of such particles, which are of great interest to use in various fields, including biomedicine.",

keywords = "biomedicine, core–shell magnetic composites, magnetic nanocomposites, magnetic nanoparticles",

author = "Kamzin, {A. S.} and Obaidat, {I. M.} and Valliulin, {A. A.} and Semenov, {V. G.} and Al-Omari, {I. A.}",

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AU - Kamzin, A. S.

AU - Obaidat, I. M.

AU - Valliulin, A. A.

AU - Semenov, V. G.

AU - Al-Omari, I. A.

PY - 2020/10/1

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N2 - Abstract: The magnetic structure and the composition of Fe3O4/γ-Fe2O3 nanoparticles are studied at 300 and 80 K with Mössbauer spectroscopy. We found that the Fe3O4/γ-Fe2O3 particles are a core–shell nanocomposite (NC), in which magnetite Fe3O4 is covered with a maghemite shell (γ-Fe2O3). We showed that the thickness of the maghemite shell (γ-Fe2O3) depends on synthesis technology. We found that a layer, whose magnetic structure differs from that of the inner part of the shell (γ-Fe2O3), is formed on the surface of the maghemite shell (γ-Fe2O3) in the Fe3O4/γ-Fe2O3 NC. An intermediate layer is formed in the spin-glass state between the core and the shell. The data on structure of core–shell nanocomposites open up prospects to explain the properties of such particles, which are of great interest to use in various fields, including biomedicine.

AB - Abstract: The magnetic structure and the composition of Fe3O4/γ-Fe2O3 nanoparticles are studied at 300 and 80 K with Mössbauer spectroscopy. We found that the Fe3O4/γ-Fe2O3 particles are a core–shell nanocomposite (NC), in which magnetite Fe3O4 is covered with a maghemite shell (γ-Fe2O3). We showed that the thickness of the maghemite shell (γ-Fe2O3) depends on synthesis technology. We found that a layer, whose magnetic structure differs from that of the inner part of the shell (γ-Fe2O3), is formed on the surface of the maghemite shell (γ-Fe2O3) in the Fe3O4/γ-Fe2O3 NC. An intermediate layer is formed in the spin-glass state between the core and the shell. The data on structure of core–shell nanocomposites open up prospects to explain the properties of such particles, which are of great interest to use in various fields, including biomedicine.

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