Zn-interstitial-enhanced ferromagnetism in Cu-doped ZnO films

T. S. Herng; Shu Ping Lau; Siu Fung Yu; J. S. Chen; K. S. Teng

doi:10.1016/j.jmmm.2007.03.190

Zn-interstitial-enhanced ferromagnetism in Cu-doped ZnO films

T. S. Herng, Shu Ping Lau, Siu Fung Yu, J. S. Chen, K. S. Teng

Research output: Journal article publication › Journal article › Academic research › peer-review

85 Citations (Scopus)

Abstract

Copper-doped ZnO (ZnO:Cu) films exhibiting room-temperature (RT) ferromagnetism were prepared by filtered cathodic vacuum arc (FCVA) technique. The ZnO:Cu films deposited at RT showed the strongest magnetic moment of 0.40 μB/Cu as compared with the samples prepared at elevated temperatures. The observed strong ferromagnetism in the RT-deposited ZnO:Cu films could be partly associated with Zn-interstitial defects. The degradation of magnetic moment in the ZnO:Cu prepared at high temperatures and annealed at elevated temperatures might be attributed to the out-diffusion of Zn interstitials to the ZnO lattice.

Original language	English
Pages (from-to)	107-110
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	315
Issue number	2
DOIs	https://doi.org/10.1016/j.jmmm.2007.03.190
Publication status	Published - 1 Aug 2007
Externally published	Yes

Keywords

Copper-doped zinc oxide
Defect
Diluted magnetic semiconductor
Ferromagnetism

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2007.03.190

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title = "Zn-interstitial-enhanced ferromagnetism in Cu-doped ZnO films",

abstract = "Copper-doped ZnO (ZnO:Cu) films exhibiting room-temperature (RT) ferromagnetism were prepared by filtered cathodic vacuum arc (FCVA) technique. The ZnO:Cu films deposited at RT showed the strongest magnetic moment of 0.40 μB/Cu as compared with the samples prepared at elevated temperatures. The observed strong ferromagnetism in the RT-deposited ZnO:Cu films could be partly associated with Zn-interstitial defects. The degradation of magnetic moment in the ZnO:Cu prepared at high temperatures and annealed at elevated temperatures might be attributed to the out-diffusion of Zn interstitials to the ZnO lattice.",

keywords = "Copper-doped zinc oxide, Defect, Diluted magnetic semiconductor, Ferromagnetism",

author = "Herng, {T. S.} and Lau, {Shu Ping} and Yu, {Siu Fung} and Chen, {J. S.} and Teng, {K. S.}",

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T1 - Zn-interstitial-enhanced ferromagnetism in Cu-doped ZnO films

AU - Herng, T. S.

AU - Lau, Shu Ping

AU - Yu, Siu Fung

AU - Chen, J. S.

AU - Teng, K. S.

PY - 2007/8/1

Y1 - 2007/8/1

N2 - Copper-doped ZnO (ZnO:Cu) films exhibiting room-temperature (RT) ferromagnetism were prepared by filtered cathodic vacuum arc (FCVA) technique. The ZnO:Cu films deposited at RT showed the strongest magnetic moment of 0.40 μB/Cu as compared with the samples prepared at elevated temperatures. The observed strong ferromagnetism in the RT-deposited ZnO:Cu films could be partly associated with Zn-interstitial defects. The degradation of magnetic moment in the ZnO:Cu prepared at high temperatures and annealed at elevated temperatures might be attributed to the out-diffusion of Zn interstitials to the ZnO lattice.

AB - Copper-doped ZnO (ZnO:Cu) films exhibiting room-temperature (RT) ferromagnetism were prepared by filtered cathodic vacuum arc (FCVA) technique. The ZnO:Cu films deposited at RT showed the strongest magnetic moment of 0.40 μB/Cu as compared with the samples prepared at elevated temperatures. The observed strong ferromagnetism in the RT-deposited ZnO:Cu films could be partly associated with Zn-interstitial defects. The degradation of magnetic moment in the ZnO:Cu prepared at high temperatures and annealed at elevated temperatures might be attributed to the out-diffusion of Zn interstitials to the ZnO lattice.

KW - Copper-doped zinc oxide

KW - Defect

KW - Diluted magnetic semiconductor

KW - Ferromagnetism

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DO - 10.1016/j.jmmm.2007.03.190

M3 - Journal article

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2

ER -

Zn-interstitial-enhanced ferromagnetism in Cu-doped ZnO films

Abstract

Keywords

ASJC Scopus subject areas

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