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

doi:10.1063/1.2772176

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 journal › Article › peer-review

179 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 language	English (US)
Article number	072511
Journal	Applied Physics Letters
Volume	91
Issue number	7
DOIs	https://doi.org/10.1063/1.2772176
State	Published - 2007
Externally published	Yes

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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@article{5292acfb364c48a1af509fa050a679f4,

title = "Role of point defects in room-temperature ferromagnetism of Cr-doped ZnO",

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.",

author = "Hui Liu and Xiao Zhang and Luyan Li and Wang, {Y. X.} and Gao, {K. H.} and Li, {Z. Q.} and Zheng, {R. K.} and Ringer, {S. P.} and Bei Zhang and Zhang, {X. X.}",

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.",

year = "2007",

doi = "10.1063/1.2772176",

language = "English (US)",

volume = "91",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "AMER INST PHYSICS",

number = "7",

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TY - JOUR

T1 - Role of point defects in room-temperature ferromagnetism of Cr-doped ZnO

AU - Liu, Hui

AU - Zhang, Xiao

AU - Li, Luyan

AU - Wang, Y. X.

AU - Gao, K. H.

AU - Li, Z. Q.

AU - Zheng, R. K.

AU - Ringer, S. P.

AU - Zhang, Bei

AU - Zhang, X. X.

N1 - 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.

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

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U2 - 10.1063/1.2772176

DO - 10.1063/1.2772176

M3 - Article

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SN - 0003-6951

VL - 91

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 7

M1 - 072511

ER -

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

Abstract

Bibliographical note

ASJC Scopus subject areas

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