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

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42 Citations (Scopus)

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.

Original languageEnglish
Article number062506
JournalApplied Physics Letters
Volume89
Issue number6
DOIs
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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