Bound magnetic polarons and p-d exchange interaction in ferromagnetic insulating Cu-doped ZnO

Yufeng Tian; Yongfeng Li; Mi He; Irwan Ade Putra; Haiyang Peng; Bin Yao; Siew Ann Cheong; Tom Wu

doi:10.1063/1.3579544

Bound magnetic polarons and p-d exchange interaction in ferromagnetic insulating Cu-doped ZnO

Yufeng Tian, Yongfeng Li, Mi He, Irwan Ade Putra, Haiyang Peng, Bin Yao, Siew Ann Cheong, Tom Wu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

122 Scopus citations

Abstract

A systematic study on the magnetic and electrical transport properties of single-phase wurtzite Zn_1-x Cu_x O is performed. Efros variable range hopping dominates the conduction, which is accompanied by a ferromagnetic order up to 700 K for x>1%. Both the first-principles calculations and Cu/Al co-doping experiments suggest that the spontaneous spin polarization originates from the p- d exchange interaction between O ^{2p and Cu}3d orbitals. Furthermore, our results are consistent with the scenario that the intrinsic ferromagnetism is established through indirect interassctions between bound magnetic polarons mediated by magnetic impurities.

Original language	English (US)
Article number	162503
Journal	Applied Physics Letters
Volume	98
Issue number	16
DOIs	https://doi.org/10.1063/1.3579544
State	Published - Apr 18 2011
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Bound magnetic polarons and p-d exchange interaction in ferromagnetic insulating Cu-doped ZnO",

abstract = "A systematic study on the magnetic and electrical transport properties of single-phase wurtzite Zn1-x Cux O is performed. Efros variable range hopping dominates the conduction, which is accompanied by a ferromagnetic order up to 700 K for x>1%. Both the first-principles calculations and Cu/Al co-doping experiments suggest that the spontaneous spin polarization originates from the p- d exchange interaction between O 2p and Cu3d orbitals. Furthermore, our results are consistent with the scenario that the intrinsic ferromagnetism is established through indirect interassctions between bound magnetic polarons mediated by magnetic impurities.",

author = "Yufeng Tian and Yongfeng Li and Mi He and Putra, {Irwan Ade} and Haiyang Peng and Bin Yao and Cheong, {Siew Ann} and Tom Wu",

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AU - Tian, Yufeng

AU - Li, Yongfeng

AU - He, Mi

AU - Putra, Irwan Ade

AU - Peng, Haiyang

AU - Yao, Bin

AU - Cheong, Siew Ann

AU - Wu, Tom

PY - 2011/4/18

Y1 - 2011/4/18

N2 - A systematic study on the magnetic and electrical transport properties of single-phase wurtzite Zn1-x Cux O is performed. Efros variable range hopping dominates the conduction, which is accompanied by a ferromagnetic order up to 700 K for x>1%. Both the first-principles calculations and Cu/Al co-doping experiments suggest that the spontaneous spin polarization originates from the p- d exchange interaction between O 2p and Cu3d orbitals. Furthermore, our results are consistent with the scenario that the intrinsic ferromagnetism is established through indirect interassctions between bound magnetic polarons mediated by magnetic impurities.

AB - A systematic study on the magnetic and electrical transport properties of single-phase wurtzite Zn1-x Cux O is performed. Efros variable range hopping dominates the conduction, which is accompanied by a ferromagnetic order up to 700 K for x>1%. Both the first-principles calculations and Cu/Al co-doping experiments suggest that the spontaneous spin polarization originates from the p- d exchange interaction between O 2p and Cu3d orbitals. Furthermore, our results are consistent with the scenario that the intrinsic ferromagnetism is established through indirect interassctions between bound magnetic polarons mediated by magnetic impurities.

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JO - Applied Physics Letters

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Bound magnetic polarons and p-d exchange interaction in ferromagnetic insulating Cu-doped ZnO

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