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, X. X. Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

178 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 - 2007
Externally publishedYes

Bibliographical note

Funding Information:
The authors thank K. L. Zhu in SDNU and W. B. Mi in TJU for valuable discussions. This work is supported by the following grants: NCET-04-0244, NSFC-50401002 and 10504024, 863 Program-2006AA03Z305, NSFT-06YFJZJC00100, and SFTEC-20041016. One of the authors (R.K.Z.) acknowledges the support from ARC (DP0770987). Another author (X.X.Z.) would also like to thank the support of RGC of Hong Kong.

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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