Intrinsic Faraday spectra of ferromagnetic rutile Ti1-xCo xO2-δ

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

doi:10.1063/1.2213517

Intrinsic Faraday spectra of ferromagnetic rutile Ti_1-xCo _xO_2-δ

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

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

16 Citations (Scopus)

Abstract

We have investigated the Faraday spectra of ferromagnetic rutile Ti _1-xCo_xO_2-δ films grown on Al ₂O₃ (0001). The Faraday spectra strongly depended on the film thickness, revealing the significant effect of the multiple reflections of light. The intrinsic Faraday spectra of rutile Ti_1-xCo _xO_2-δ were corrected for this multiple reflection effect on the basis of an optical model and compared with the absorption spectra in detail. The quantitatively good correspondence between intrinsic Faraday ellipticity and optical band edge strongly suggests that rutile Ti _1-xCo_xO_2-δ is an intrinsic ferromagnetic semiconductor. The exchange parameters, N₀α and N ₀β, were estimated as the order of ∼0.1 eV.

Original language	English
Article number	252508
Journal	Applied Physics Letters
Volume	88
Issue number	25
DOIs	https://doi.org/10.1063/1.2213517
Publication status	Published - 2006 Jun 19

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Intrinsic Faraday spectra of ferromagnetic rutile Ti1-xCo xO2-δ ",

abstract = "We have investigated the Faraday spectra of ferromagnetic rutile Ti 1-xCoxO2-δ films grown on Al 2O3 (0001). The Faraday spectra strongly depended on the film thickness, revealing the significant effect of the multiple reflections of light. The intrinsic Faraday spectra of rutile Ti1-xCo xO2-δ were corrected for this multiple reflection effect on the basis of an optical model and compared with the absorption spectra in detail. The quantitatively good correspondence between intrinsic Faraday ellipticity and optical band edge strongly suggests that rutile Ti 1-xCoxO2-δ is an intrinsic ferromagnetic semiconductor. The exchange parameters, N0α and N 0β, were estimated as the order of ∼0.1 eV.",

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T1 - Intrinsic Faraday spectra of ferromagnetic rutile Ti1-xCo xO2-δ

AU - Hirose, Yasushi

AU - Hitosugi, Taro

AU - Furubayashi, Yutaka

AU - Kinoda, Go

AU - Inaba, Kazuhisa

AU - Shimada, Toshihiro

AU - Hasegawa, Tetsuya

PY - 2006/6/19

Y1 - 2006/6/19

N2 - We have investigated the Faraday spectra of ferromagnetic rutile Ti 1-xCoxO2-δ films grown on Al 2O3 (0001). The Faraday spectra strongly depended on the film thickness, revealing the significant effect of the multiple reflections of light. The intrinsic Faraday spectra of rutile Ti1-xCo xO2-δ were corrected for this multiple reflection effect on the basis of an optical model and compared with the absorption spectra in detail. The quantitatively good correspondence between intrinsic Faraday ellipticity and optical band edge strongly suggests that rutile Ti 1-xCoxO2-δ is an intrinsic ferromagnetic semiconductor. The exchange parameters, N0α and N 0β, were estimated as the order of ∼0.1 eV.

AB - We have investigated the Faraday spectra of ferromagnetic rutile Ti 1-xCoxO2-δ films grown on Al 2O3 (0001). The Faraday spectra strongly depended on the film thickness, revealing the significant effect of the multiple reflections of light. The intrinsic Faraday spectra of rutile Ti1-xCo xO2-δ were corrected for this multiple reflection effect on the basis of an optical model and compared with the absorption spectra in detail. The quantitatively good correspondence between intrinsic Faraday ellipticity and optical band edge strongly suggests that rutile Ti 1-xCoxO2-δ is an intrinsic ferromagnetic semiconductor. The exchange parameters, N0α and N 0β, were estimated as the order of ∼0.1 eV.

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