Enhancement of magneto-optical properties of anatase Co:TiO2 Co-doped with Nb

Go Kinoda; Taro Hitosugi; Yukio Yamamoto; Yutaka Furubayashi; Kazuhisa Inaba; Yasushi Hirose; Toshihiro Shimada; Tetsuya Hasegawa

doi:10.1143/JJAP.45.L387

Enhancement of magneto-optical properties of anatase Co:TiO₂ Co-doped with Nb

Go Kinoda, Taro Hitosugi, Yukio Yamamoto, Yutaka Furubayashi, Kazuhisa Inaba, Yasushi Hirose, Toshihiro Shimada, Tetsuya Hasegawa

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

6 Citations (Scopus)

Abstract

We have fabricated Ti_0.95-xNb_xCo_0.05O ₂ thin films by the pulsed laser deposition technique. Carrier density was found to be almost identical to the Nb concentration up to x = 0.06, indicating that doped Nb atoms generate carriers with >80% efficiency. In this doping range, magneto-optical properties were significantly enhanced by Nb-doping. The remanent Faraday rotation at a wavelength of 405 nm was as high as 5.6 × 10³ deg/cm, which is approximately one order of magnitude higher than that of a film free of Nb-doping. The present results support the hypothesis that conduction electrons play an essentialrole in the ferromagnetism of Co-doped TiO₂.

Original language	English
Pages (from-to)	L387-L389
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	45
Issue number	12-16
DOIs	https://doi.org/10.1143/JJAP.45.L387
Publication status	Published - 2006

Keywords

Co-doping
DMS
Diluted magnetic semiconductor
Epitaxial
Ferromagnetism
PLD
Pulsed laser deposition
Thin film
TiO

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy (miscellaneous)
Physics and Astronomy(all)

Access to Document

10.1143/JJAP.45.L387

Cite this

Enhancement of magneto-optical properties of anatase Co:TiO₂ Co-doped with Nb. / Kinoda, Go; Hitosugi, Taro; Yamamoto, Yukio; Furubayashi, Yutaka; Inaba, Kazuhisa; Hirose, Yasushi; Shimada, Toshihiro; Hasegawa, Tetsuya.

In: Japanese Journal of Applied Physics, Part 2: Letters, Vol. 45, No. 12-16, 2006, p. L387-L389.

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

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title = "Enhancement of magneto-optical properties of anatase Co:TiO2 Co-doped with Nb",

abstract = "We have fabricated Ti0.95-xNbxCo0.05O 2 thin films by the pulsed laser deposition technique. Carrier density was found to be almost identical to the Nb concentration up to x = 0.06, indicating that doped Nb atoms generate carriers with >80% efficiency. In this doping range, magneto-optical properties were significantly enhanced by Nb-doping. The remanent Faraday rotation at a wavelength of 405 nm was as high as 5.6 × 103 deg/cm, which is approximately one order of magnitude higher than that of a film free of Nb-doping. The present results support the hypothesis that conduction electrons play an essentialrole in the ferromagnetism of Co-doped TiO2.",

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author = "Go Kinoda and Taro Hitosugi and Yukio Yamamoto and Yutaka Furubayashi and Kazuhisa Inaba and Yasushi Hirose and Toshihiro Shimada and Tetsuya Hasegawa",

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AU - Kinoda, Go

AU - Hitosugi, Taro

AU - Yamamoto, Yukio

AU - Furubayashi, Yutaka

AU - Inaba, Kazuhisa

AU - Hirose, Yasushi

AU - Shimada, Toshihiro

AU - Hasegawa, Tetsuya

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AB - We have fabricated Ti0.95-xNbxCo0.05O 2 thin films by the pulsed laser deposition technique. Carrier density was found to be almost identical to the Nb concentration up to x = 0.06, indicating that doped Nb atoms generate carriers with >80% efficiency. In this doping range, magneto-optical properties were significantly enhanced by Nb-doping. The remanent Faraday rotation at a wavelength of 405 nm was as high as 5.6 × 103 deg/cm, which is approximately one order of magnitude higher than that of a film free of Nb-doping. The present results support the hypothesis that conduction electrons play an essentialrole in the ferromagnetism of Co-doped TiO2.

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