Polycrystalline Crx Zn1-x O films and powders are prepared by cosputtering and sol-gel method, respectively. While room-temperature ferromagnetism is found in as-deposited films, the powders exhibit paramagnetism. Comparison of the structural and magnetic properties of the as-deposited, annealed, and powdered samples indicates that the interstitial zinc, together with Cr doping, plays an important role in the ferromagnetic origin of Cr:ZnO. The ferromagnetism in films can be described by bound magnetic polaron models with respect to defect-bound carriers.
|Original language||English (US)|
|Journal||Applied Physics Letters|
|State||Published - 2007|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)