Preparation and Magnetic Properties of Fe3O4/MO(M=Ni, Co) Superlattices

Tatsuo Fujii; Hiroshi Asaoka; Makoto Nakanishi; Jun Takada

doi:10.2497/jjspm.45.58

Preparation and Magnetic Properties of Fe₃O₄/MO(M=Ni, Co) Superlattices

Tatsuo Fujii, Hiroshi Asaoka, Makoto Nakanishi, Jun Takada

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

Abstract

The structural, electric and magnetic properties of (100)-oriented Fe₃O₄/NiO and Fe₃O₄/CoO superlattices on MgO(100) have been studied. The films were prepared by an activated reactive evaporation method. The lattice constants of each layers were a little changed from the bulk values due to a lattice mismatch with the substrate. The Fe 2p XPS of both Fe₃O₄/NiO and Fe₃O₄/CoO interfaces suggested the formation of stoichiometric Fe₃O₄. The saturation magnetizations (Ms) of Fe₃O₄/MO superlattices were compared with that of a Fe₃O₄ thin film as a function of the thickness of MO layers. The reduction in Ms of Fe₃O₄/NiO could be linked with the large exchange coupling with NiO. While the increase in Ms of Fe₃O₄/CoO was probably caused by the ferromagnetic coupling of the CoO interface with the Fe₃O₄ layer.

Original language	English
Pages (from-to)	58-62
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	45
Issue number	1
DOIs	https://doi.org/10.2497/jjspm.45.58
Publication status	Published - Jan 1998

Keywords

Cobalt oxide
Exchange coupling
Magnetite
Nickel oxide
Oxide superlattice

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.2497/jjspm.45.58

Cite this

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title = "Preparation and Magnetic Properties of Fe3O4/MO(M=Ni, Co) Superlattices",

abstract = "The structural, electric and magnetic properties of (100)-oriented Fe3O4/NiO and Fe3O4/CoO superlattices on MgO(100) have been studied. The films were prepared by an activated reactive evaporation method. The lattice constants of each layers were a little changed from the bulk values due to a lattice mismatch with the substrate. The Fe 2p XPS of both Fe3O4/NiO and Fe3O4/CoO interfaces suggested the formation of stoichiometric Fe3O4. The saturation magnetizations (Ms) of Fe3O4/MO superlattices were compared with that of a Fe3O4 thin film as a function of the thickness of MO layers. The reduction in Ms of Fe3O4/NiO could be linked with the large exchange coupling with NiO. While the increase in Ms of Fe3O4/CoO was probably caused by the ferromagnetic coupling of the CoO interface with the Fe3O4 layer.",

keywords = "Cobalt oxide, Exchange coupling, Magnetite, Nickel oxide, Oxide superlattice",

author = "Tatsuo Fujii and Hiroshi Asaoka and Makoto Nakanishi and Jun Takada",

year = "1998",

month = jan,

doi = "10.2497/jjspm.45.58",

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AU - Fujii, Tatsuo

AU - Asaoka, Hiroshi

AU - Nakanishi, Makoto

AU - Takada, Jun

PY - 1998/1

Y1 - 1998/1

N2 - The structural, electric and magnetic properties of (100)-oriented Fe3O4/NiO and Fe3O4/CoO superlattices on MgO(100) have been studied. The films were prepared by an activated reactive evaporation method. The lattice constants of each layers were a little changed from the bulk values due to a lattice mismatch with the substrate. The Fe 2p XPS of both Fe3O4/NiO and Fe3O4/CoO interfaces suggested the formation of stoichiometric Fe3O4. The saturation magnetizations (Ms) of Fe3O4/MO superlattices were compared with that of a Fe3O4 thin film as a function of the thickness of MO layers. The reduction in Ms of Fe3O4/NiO could be linked with the large exchange coupling with NiO. While the increase in Ms of Fe3O4/CoO was probably caused by the ferromagnetic coupling of the CoO interface with the Fe3O4 layer.

AB - The structural, electric and magnetic properties of (100)-oriented Fe3O4/NiO and Fe3O4/CoO superlattices on MgO(100) have been studied. The films were prepared by an activated reactive evaporation method. The lattice constants of each layers were a little changed from the bulk values due to a lattice mismatch with the substrate. The Fe 2p XPS of both Fe3O4/NiO and Fe3O4/CoO interfaces suggested the formation of stoichiometric Fe3O4. The saturation magnetizations (Ms) of Fe3O4/MO superlattices were compared with that of a Fe3O4 thin film as a function of the thickness of MO layers. The reduction in Ms of Fe3O4/NiO could be linked with the large exchange coupling with NiO. While the increase in Ms of Fe3O4/CoO was probably caused by the ferromagnetic coupling of the CoO interface with the Fe3O4 layer.

KW - Cobalt oxide

KW - Exchange coupling

KW - Magnetite

KW - Nickel oxide

KW - Oxide superlattice

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