Magnetic properties of Fe1.2Ti0.8O 3/Fe2O3 bilayered films

Tatsuo Fujii; Yusuke Takada; Makoto Nakanishi; Jun Takada

doi:10.1109/TMAG.2005.854820

Magnetic properties of Fe_1.2Ti_0.8O ₃/Fe₂O₃ bilayered films

Tatsuo Fujii, Yusuke Takada, Makoto Nakanishi, Jun Takada

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

4 Citations (Scopus)

Abstract

Hematite-ilmenite (α-Fe₂O₃-FeTiO₃) solid solution system is one of the candidates for high-temperature magnetic semiconductors. The intermediate composition, Fe_1.2Ti _0.8O₃, is known to have the maximum saturation magnetization at low temperature. We have successfully prepared well-crystallized Fe_1.2Ti_0.8O₃ and Fe _1.2Ti_0.8Fe₂O₃ bilayered films by using reactive helicon plasma sputtering. The Fe_1.2Ti _0.8O₃ films without Fe₂O₃ layers showed lower T_C of about 200 K, while the T_C of Fe _1.2Ti_0.8O₃ layers in the bilayered films increased to about 220 K. The bilayered films had a sharp interface between Fe_1.2Ti_0.8O₃ and α-Fe₂O ₃. The strong magnetic coupling between two layers seemed to increase the T_C of the attached Fe_1.2Ti_0.8O₃ layers.

Original language	English
Pages (from-to)	2775-2777
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	41
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2005.854820
Publication status	Published - Oct 2005

Keywords

Exchange coupling
Iron titanium oxides
Magnetic semiconductor
Sputtered film

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2005.854820

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@article{f5db76a704fc4b249b1bf94029f50477,

title = "Magnetic properties of Fe1.2Ti0.8O 3/Fe2O3 bilayered films",

abstract = "Hematite-ilmenite (α-Fe2O3-FeTiO3) solid solution system is one of the candidates for high-temperature magnetic semiconductors. The intermediate composition, Fe1.2Ti 0.8O3, is known to have the maximum saturation magnetization at low temperature. We have successfully prepared well-crystallized Fe1.2Ti0.8O3 and Fe 1.2Ti0.8Fe2O3 bilayered films by using reactive helicon plasma sputtering. The Fe1.2Ti 0.8O3 films without Fe2O3 layers showed lower TC of about 200 K, while the TC of Fe 1.2Ti0.8O3 layers in the bilayered films increased to about 220 K. The bilayered films had a sharp interface between Fe1.2Ti0.8O3 and α-Fe2O 3. The strong magnetic coupling between two layers seemed to increase the TC of the attached Fe1.2Ti0.8O3 layers.",

keywords = "Exchange coupling, Iron titanium oxides, Magnetic semiconductor, Sputtered film",

author = "Tatsuo Fujii and Yusuke Takada and Makoto Nakanishi and Jun Takada",

note = "Funding Information: This work was supported in part by the Ministry of Education, Science, Sports, and Culture, Japan, Grant-in-Aid for Scientific Research (B), 14350353. The authors are grateful to Dr. H. Yoshikawa, National Institute for Material Science, and Dr. M. Kimura, SPring-8 Service Co. Ltd. for technical support in the XPS measurement.",

year = "2005",

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doi = "10.1109/TMAG.2005.854820",

language = "English",

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AU - Fujii, Tatsuo

AU - Takada, Yusuke

AU - Nakanishi, Makoto

AU - Takada, Jun

N1 - Funding Information: This work was supported in part by the Ministry of Education, Science, Sports, and Culture, Japan, Grant-in-Aid for Scientific Research (B), 14350353. The authors are grateful to Dr. H. Yoshikawa, National Institute for Material Science, and Dr. M. Kimura, SPring-8 Service Co. Ltd. for technical support in the XPS measurement.

PY - 2005/10

Y1 - 2005/10

N2 - Hematite-ilmenite (α-Fe2O3-FeTiO3) solid solution system is one of the candidates for high-temperature magnetic semiconductors. The intermediate composition, Fe1.2Ti 0.8O3, is known to have the maximum saturation magnetization at low temperature. We have successfully prepared well-crystallized Fe1.2Ti0.8O3 and Fe 1.2Ti0.8Fe2O3 bilayered films by using reactive helicon plasma sputtering. The Fe1.2Ti 0.8O3 films without Fe2O3 layers showed lower TC of about 200 K, while the TC of Fe 1.2Ti0.8O3 layers in the bilayered films increased to about 220 K. The bilayered films had a sharp interface between Fe1.2Ti0.8O3 and α-Fe2O 3. The strong magnetic coupling between two layers seemed to increase the TC of the attached Fe1.2Ti0.8O3 layers.

AB - Hematite-ilmenite (α-Fe2O3-FeTiO3) solid solution system is one of the candidates for high-temperature magnetic semiconductors. The intermediate composition, Fe1.2Ti 0.8O3, is known to have the maximum saturation magnetization at low temperature. We have successfully prepared well-crystallized Fe1.2Ti0.8O3 and Fe 1.2Ti0.8Fe2O3 bilayered films by using reactive helicon plasma sputtering. The Fe1.2Ti 0.8O3 films without Fe2O3 layers showed lower TC of about 200 K, while the TC of Fe 1.2Ti0.8O3 layers in the bilayered films increased to about 220 K. The bilayered films had a sharp interface between Fe1.2Ti0.8O3 and α-Fe2O 3. The strong magnetic coupling between two layers seemed to increase the TC of the attached Fe1.2Ti0.8O3 layers.

KW - Exchange coupling

KW - Iron titanium oxides

KW - Magnetic semiconductor

KW - Sputtered film

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