Physics – Condensed Matter – Materials Science
Scientific paper
2006-03-07
Appl. Phys. Lett. 89, 062506 (2006)
Physics
Condensed Matter
Materials Science
11 pages including 3 figures
Scientific paper
10.1063/1.2236829
Soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L2,3 edges of Co doped rutile TiO2 at room temperature have revealed clear multiplet features characteristic of ferromagnetic Co2+ 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 Ti4+ ions.
Fujimori Atsushi
Fukumura Tomoteru
Kawasaki Masahiro
Koide Takashi
Mamiya K.
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