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
Externally published	Yes

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(all)

Access to Document

10.1143/JJAP.45.L387

Cite this

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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.",

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

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

year = "2006",

doi = "10.1143/JJAP.45.L387",

language = "English",

volume = "45",

pages = "L387--L389",

journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

number = "12-16",

}

TY - JOUR

T1 - Enhancement of magneto-optical properties of anatase Co:TiO2 Co-doped with Nb

AU - Kinoda, Go

AU - Hitosugi, Taro

AU - Yamamoto, Yukio

AU - Furubayashi, Yutaka

AU - Inaba, Kazuhisa

AU - Hirose, Yasushi

AU - Shimada, Toshihiro

AU - Hasegawa, Tetsuya

PY - 2006

Y1 - 2006

N2 - 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.

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.

KW - Co-doping

KW - DMS

KW - Diluted magnetic semiconductor

KW - Epitaxial

KW - Ferromagnetism

KW - PLD

KW - Pulsed laser deposition

KW - Thin film

KW - TiO

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JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

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