Indication of intrinsic room-temperature ferromagnetism in Ti1-xCoxO2-d thin film: An x-ray magnetic circular dichroism study

Abstract

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.

11 pages including 3 figures

References in corpus (1)

• Characterization of Magnetic Components in the Diluted Magnetic Semiconductor Zn${}_{1-x}$Co${}_x$O by X-ray Magnetic Circular Dichroism

Cited by in corpus (8)

• Experimental studies on vacancy induced ferromagnetism in undoped TiO2
• Nanosized superparamagnetic precipitates in cobalt-doped ZnO
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• Soft x-ray magnetic circular dichroism study of weakly ferromagnetic Zn${}_{1-x}$V${}_x$O thin film
• X-ray Anomalous Scattering of Diluted Magnetic Oxide Semiconductors: Possible Evidence of Lattice Deformation for High Temperature Ferromagnetism
• Local electronic structure of Cr in the II-VI diluted ferromagnetic semiconductor Zn${}_{1-x}$Cr${}_x$Te
• X-ray absorption spectroscopy and X-ray magnetic circular dichroism studies of transition-metal-co-doped ZnO nano-particles