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

Tatsuo Fujii, Hiroshi Asaoka, Makoto Nakanishi, Jun Takada

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)58-62
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume45
Issue number1
Publication statusPublished - Jan 1998

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Superlattices
Magnetization
Magnetic properties
Exchange coupling
Lattice mismatch
Saturation magnetization
Lattice constants
Structural properties
Evaporation
Electric properties
X ray photoelectron spectroscopy
Thin films
Substrates

Keywords

  • Cobalt oxide
  • Exchange coupling
  • Magnetite
  • Nickel oxide
  • Oxide superlattice

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

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",
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T1 - Preparation and Magnetic Properties of Fe3O4/MO(M=Ni, Co) Superlattices

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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