Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1801540 | Journal of Magnetism and Magnetic Materials | 2010 | 5 Pages |
Abstract
CoPt-TiO2 nanocomposite films were synthesized by rapid thermal annealing of CoPt/TiO2 multilayers. The effects of annealing temperature, annealing time, Ag addition and TiO2 volume fraction on the microstructures and magnetic properties of the CoPt-TiO2 nanocomposite films were studied. Results showed that the ordering degree of CoPt and coercivity of CoPt-TiO2 nanocomposites increased with annealing temperature. Increasing annealing time and Ag addition were able to increase the ordering degree and coercivity of CoPt. However, complete L10-ordering of CoPt at 550 °C annealing was not realized by increasing annealing time up to 30 min and Ag addition up to 30 vol.%. Increasing TiO2 volume fraction at 700 °C annealing did not lead to the change of ordering of CoPt. However, the grain structure of the films changed slightly when TiO2 volume fraction was larger than 56%. The coercivity of the film decreased slightly with the addition of TiO2.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Rujun Tang, Wanli Zhang, Yanrong Li,