Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1804399 | Journal of Magnetism and Magnetic Materials | 2007 | 4 Pages |
Abstract
The importance of doping ZnO with magnetic ions is associated with the fact that this oxide is a good candidate for the formation of a magnetic-diluted semiconductor. Most of the studies reported in Co-doped ZnO were carried out in thin films, but the understanding of the modification of the magnetic behaviour due to doping demands the study of single-crystalline samples. In this work, ZnO single crystals were doped at room temperature with Co by ion implantation with fluences ranging between 2Ã1016 and 1Ã1017 ions cmâ2 and implantation energy of 100 keV. As implanted samples show a superparamagnetic behaviour attributed to the formation of Co clusters, room temperature ferromagnetism is attained after annealing at 800 °C, but no magnetoresistance was detected in the temperature range from 10 to 300 K.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
R.P. Borges, J.V. Pinto, R.C. da Silva, A.P. Gonçalves, M.M. Cruz, M. Godinho,