Role of point defects in room-temperature ferromagnetism of Cr-doped ZnO

Hui Liu*, Xiao Zhang, Luyan Li, Y. X. Wang, K. H. Gao, Z. Q. Li, R. K. Zheng, S. P. Ringer, Bei Zhang, Xixiang Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

162 Scopus citations

Abstract

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 languageEnglish (US)
Article number072511
JournalApplied Physics Letters
Volume91
Issue number7
DOIs
StatePublished - Aug 24 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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