期刊
CHEMICAL PHYSICS LETTERS
卷 487, 期 1-3, 页码 97-100出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2010.01.037
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资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT)
We report structural, optical and magnetization properties of cobalt-doped zinc oxide thin films prepared on Si substrates by spray pyrolysis technique. Grazing angle X-ray diffraction measurements confirms the wurtzite structure of Zn(1) (x)Co(x)O films. Optical reflectance measurements reveal that the optical gap energy increases with increasing Co concentration indicating that Co(2+) ions replaces Zn(2+) ions in the ZnO lattice. Hysteresis measurements demonstrate that the Co-doped ZnO films are magnetically anisotropic and they exhibit intrinsic ferromagnetic behavior at room temperature. Higher magnetization in 3 kOe values are observed for a field applied perpendicular to the sample surface compared to in-plane direction. (C) 2010 Elsevier B.V. All rights reserved.
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