Preparation and characterization of Fe3O4/CoO superlattices by reactive vapor deposition method

Tatsuo Fujii, Mitsuhiro Asano, Hiroshi Asaoka, Yoshinari Miura, Jun Takada

Research output: Contribution to journalArticle

Abstract

(100)- and (111)-oriented Fe3O4/CoO superlattices were prepared on MgO(100) and α-Al2O3(0001) single crystalline substrates, respectively, by activated reactive vapor deposition method. X-ray diffraction analysis suggests that the lattice spacing along the growth direction was contracted for the CoO layer but expanded for the Fe3O4 layer probably due to the lattice mismatch between these layers. The magnetostriction of CoO layers induced in-plane and perpendicular magnetic anisotropy in (100)- and (111)-oriented superlattices, respectively. Coercive force along the magnetic easy axis was increased with increasing the thickness of the CoO layer but decreased with increasing that of the Fe3O4 layer. Strong magnetic coupling between Fe3O4 and CoO layers made the Neel temperature of the CoO layer higher and showed the ferrimagnetic/antiferromagnetic exchange anisotropy.

Original languageEnglish
Pages (from-to)34-39
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume42
Issue number1
Publication statusPublished - Jan 1995

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Vapor deposition
Superlattices
Magnetic couplings
Neel temperature
Lattice mismatch
Magnetostriction
Magnetic anisotropy
Coercive force
X ray diffraction analysis
Anisotropy
Crystalline materials
Substrates
Direction compound

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

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Preparation and characterization of Fe3O4/CoO superlattices by reactive vapor deposition method. / Fujii, Tatsuo; Asano, Mitsuhiro; Asaoka, Hiroshi; Miura, Yoshinari; Takada, Jun.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 42, No. 1, 01.1995, p. 34-39.

Research output: Contribution to journalArticle

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AB - (100)- and (111)-oriented Fe3O4/CoO superlattices were prepared on MgO(100) and α-Al2O3(0001) single crystalline substrates, respectively, by activated reactive vapor deposition method. X-ray diffraction analysis suggests that the lattice spacing along the growth direction was contracted for the CoO layer but expanded for the Fe3O4 layer probably due to the lattice mismatch between these layers. The magnetostriction of CoO layers induced in-plane and perpendicular magnetic anisotropy in (100)- and (111)-oriented superlattices, respectively. Coercive force along the magnetic easy axis was increased with increasing the thickness of the CoO layer but decreased with increasing that of the Fe3O4 layer. Strong magnetic coupling between Fe3O4 and CoO layers made the Neel temperature of the CoO layer higher and showed the ferrimagnetic/antiferromagnetic exchange anisotropy.

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