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Ferromagnetism induced by clustered Co in Co-doped anatase TiO2 thin films SCIE SCOPUS
- Title
- Ferromagnetism induced by clustered Co in Co-doped anatase TiO2 thin films
- Authors
- Kim, JY; Park, JH; Park, BG; Noh, HJ; Oh, SJ; Yang, JS; Kim, DH; Bu, SD; Noh, TW; Lin, HJ; Hsieh, HH; Chen, CT
- Date Issued
- 2003-01-10
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- We investigated ferromagnetism of a newly discovered ferromagnetic semiconductor Co-doped anatase TiO2 thin film, using the magnetic circular dichroism (MCD) at the Co L-2,L-3 absorption edges. The magnetic moment was observed to be similar to0.1mu(B)/Co in the measurements, but the MCD spectral line shape is nearly identical to that of Co metal, showing that the ferromagnetism is induced by a small amount of clustered Co. With thermal treatments at similar to400degreesC, the MCD signal increases, and the moment reaches up to similar to1.55mu(B)/Co, which is similar to90% of the moment in Co metal. In the latter case, the cluster size was observed to be 20-60 nm.
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 90, no. 1, 2003-01-10
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Related Researcher
- 박재훈PARK, JAE HOON
- Dept of Physics