Large magneto-optical effect in an oxide diluted magnetic semiconductor Zn1-xCoxO

K. Ando; H. Saito; Zhengwu Jin; T. Fukumura; M. Kawasaki; Y. Matsumoto; H. Koinuma

doi:10.1063/1.1368375

Large magneto-optical effect in an oxide diluted magnetic semiconductor Zn_1-xCo_xO

K. Ando, H. Saito, Zhengwu Jin, T. Fukumura, M. Kawasaki, Y. Matsumoto, H. Koinuma

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

197 Citations (Scopus)

Abstract

Strong magneto-optical effect of Zn_1-xCo_xO near the optical band gap is reported. Magnetic circular dichroism (MCD) and Faraday rotation of Zn_1-xCo_xO (x = 0.012 and 0.016) at 5 K are as high as 2°/cm Oe at 3.4 eV, which are about two orders larger than those of ZnO. Absence of strong Co²⁺ d-d* transition near the optical band gap makes Zn_1-xCo_xO an useful material for short-wavelength magneto-optical applications. Large magneto-optical effects and paramagnetic temperature dependence of MCD show a strong mixing of the sp bands of the host ZnO with Co²⁺ d orbitals. The polarity of the MCD peak is negative indicating the antiferromagnetic p-d exchange interaction.

Original language	English
Pages (from-to)	2700-2702
Number of pages	3
Journal	Applied Physics Letters
Volume	78
Issue number	18
DOIs	https://doi.org/10.1063/1.1368375
Publication status	Published - 2001 Apr 30

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abstract = "Strong magneto-optical effect of Zn1-xCoxO near the optical band gap is reported. Magnetic circular dichroism (MCD) and Faraday rotation of Zn1-xCoxO (x = 0.012 and 0.016) at 5 K are as high as 2°/cm Oe at 3.4 eV, which are about two orders larger than those of ZnO. Absence of strong Co2+ d-d* transition near the optical band gap makes Zn1-xCoxO an useful material for short-wavelength magneto-optical applications. Large magneto-optical effects and paramagnetic temperature dependence of MCD show a strong mixing of the sp bands of the host ZnO with Co2+ d orbitals. The polarity of the MCD peak is negative indicating the antiferromagnetic p-d exchange interaction.",

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T1 - Large magneto-optical effect in an oxide diluted magnetic semiconductor Zn1-xCoxO

AU - Ando, K.

AU - Saito, H.

AU - Jin, Zhengwu

AU - Fukumura, T.

AU - Kawasaki, M.

AU - Matsumoto, Y.

AU - Koinuma, H.

PY - 2001/4/30

Y1 - 2001/4/30

N2 - Strong magneto-optical effect of Zn1-xCoxO near the optical band gap is reported. Magnetic circular dichroism (MCD) and Faraday rotation of Zn1-xCoxO (x = 0.012 and 0.016) at 5 K are as high as 2°/cm Oe at 3.4 eV, which are about two orders larger than those of ZnO. Absence of strong Co2+ d-d* transition near the optical band gap makes Zn1-xCoxO an useful material for short-wavelength magneto-optical applications. Large magneto-optical effects and paramagnetic temperature dependence of MCD show a strong mixing of the sp bands of the host ZnO with Co2+ d orbitals. The polarity of the MCD peak is negative indicating the antiferromagnetic p-d exchange interaction.

AB - Strong magneto-optical effect of Zn1-xCoxO near the optical band gap is reported. Magnetic circular dichroism (MCD) and Faraday rotation of Zn1-xCoxO (x = 0.012 and 0.016) at 5 K are as high as 2°/cm Oe at 3.4 eV, which are about two orders larger than those of ZnO. Absence of strong Co2+ d-d* transition near the optical band gap makes Zn1-xCoxO an useful material for short-wavelength magneto-optical applications. Large magneto-optical effects and paramagnetic temperature dependence of MCD show a strong mixing of the sp bands of the host ZnO with Co2+ d orbitals. The polarity of the MCD peak is negative indicating the antiferromagnetic p-d exchange interaction.

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Large magneto-optical effect in an oxide diluted magnetic semiconductor Zn_1-xCo_xO

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