Indication of intrinsic room-temperature ferromagnetism in Ti 1-xCoxO2-δ thin film: An x-ray magnetic circular dichroism study

K. Mamiya; T. Koide; A. Fujimori; H. Tokano; H. Manaka; A. Tanaka; H. Toyosaki; T. Fukumura; M. Kawasaki

doi:10.1063/1.2236829

Indication of intrinsic room-temperature ferromagnetism in Ti _1-xCo_xO_2-δ thin film: An x-ray magnetic circular dichroism study

K. Mamiya, T. Koide, A. Fujimori, H. Tokano, H. Manaka, A. Tanaka, H. Toyosaki, T. Fukumura, M. Kawasaki

研究成果: Article › 査読

44 被引用数 (Scopus)

抄録

Soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L _2,3 edges of Co-doped rutile TiO₂ at room temperature revealed clear multiplet features characteristic of ferromagnetic Co ²⁺ ions coordinated by O^2- ions, being in sharp contrast to the featureless XMCD spectrum of Co metal or metallic clusters. The absorption and XMCD spectra agree well with a full atomic-multiplet calculation for the Co²⁺ high-spin state in the D_2h-symmetry crystal field at the Ti site in rutile TiO₂. The results indicate that the ferromagnetism arises from the Co²⁺ ions substituting the Ti ⁴⁺ ions.

本文言語	English
論文番号	062506
ジャーナル	Applied Physics Letters
巻	89
号	6
DOI	https://doi.org/10.1063/1.2236829
出版ステータス	Published - 2006

ASJC Scopus subject areas

物理学および天文学（その他）

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title = "Indication of intrinsic room-temperature ferromagnetism in Ti 1-xCoxO2-δ thin film: An x-ray magnetic circular dichroism study",

abstract = "Soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L 2,3 edges of Co-doped rutile TiO2 at room temperature revealed clear multiplet features characteristic of ferromagnetic Co 2+ ions coordinated by O2- ions, being in sharp contrast to the featureless XMCD spectrum of Co metal or metallic clusters. The absorption and XMCD spectra agree well with a full atomic-multiplet calculation for the Co2+ high-spin state in the D2h-symmetry crystal field at the Ti site in rutile TiO2. The results indicate that the ferromagnetism arises from the Co2+ ions substituting the Ti 4+ ions.",

author = "K. Mamiya and T. Koide and A. Fujimori and H. Tokano and H. Manaka and A. Tanaka and H. Toyosaki and T. Fukumura and M. Kawasaki",

note = "Funding Information: This work was done under the approval of the Photon Factory Program Advisory Committee (Proposal No. 2004G206). This work was partially supported by a Grant-in-Aid for Scientific Research (16204024) from the Japan Society for the Promotion of Science. ",

year = "2006",

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T1 - Indication of intrinsic room-temperature ferromagnetism in Ti 1-xCoxO2-δ thin film

T2 - An x-ray magnetic circular dichroism study

AU - Mamiya, K.

AU - Koide, T.

AU - Fujimori, A.

AU - Tokano, H.

AU - Manaka, H.

AU - Tanaka, A.

AU - Toyosaki, H.

AU - Fukumura, T.

AU - Kawasaki, M.

N1 - Funding Information: This work was done under the approval of the Photon Factory Program Advisory Committee (Proposal No. 2004G206). This work was partially supported by a Grant-in-Aid for Scientific Research (16204024) from the Japan Society for the Promotion of Science.

PY - 2006

Y1 - 2006

N2 - Soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L 2,3 edges of Co-doped rutile TiO2 at room temperature revealed clear multiplet features characteristic of ferromagnetic Co 2+ ions coordinated by O2- ions, being in sharp contrast to the featureless XMCD spectrum of Co metal or metallic clusters. The absorption and XMCD spectra agree well with a full atomic-multiplet calculation for the Co2+ high-spin state in the D2h-symmetry crystal field at the Ti site in rutile TiO2. The results indicate that the ferromagnetism arises from the Co2+ ions substituting the Ti 4+ ions.

AB - Soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L 2,3 edges of Co-doped rutile TiO2 at room temperature revealed clear multiplet features characteristic of ferromagnetic Co 2+ ions coordinated by O2- ions, being in sharp contrast to the featureless XMCD spectrum of Co metal or metallic clusters. The absorption and XMCD spectra agree well with a full atomic-multiplet calculation for the Co2+ high-spin state in the D2h-symmetry crystal field at the Ti site in rutile TiO2. The results indicate that the ferromagnetism arises from the Co2+ ions substituting the Ti 4+ ions.

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