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Room-temperature ferromagnetism in Mn-N Co-doped p-ZnO epilayers by metal-organic chemical vapor deposition

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Abstract

Mn-N co-doped Zn epilayers were grown by metal-organic chemical vapor deposition. The Mn-N co-doped epilayers exhibit single phase hexagonal wurtzite structure, indicative of the small lattice damage from co-doping. Secondary ion mass spectroscopy analysis indicates that Mn and N atoms have been in situ incorporated into the ZnO epilayer. Hall measurements exhibit the conduction transition from n-type of the N mono-doped ZnO to p-type of the Mn-N codoped ZnO epilayer. This behavior is attributed to the low formation energy of Mn-N neighboring bonds in the co-doped epilayers. Mn doping leads to the low incorporation of N-H and N-N complexes, which are abundant in the N mono-doped epilayer and always act as compensation centers of holes. Moreover, room temperature ferromagnetism has been observed on the above co-doped epilayer, which is possibly due to the hole mediation on the ferromagnetic ordering of Mn atoms.

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Authors and Affiliations

  1. Key Laboratory of Advanced Photonic and Electronic Materials and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China

    S.M. Liu, S.L. Gu, J.D. Ye, S.M. Zhu, W. Liu, K. Tang, Z.P. Shan, R. Zhang & Y.D. Zheng

  2. School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore, Singapore

    X.W. Sun

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  1. S.M. Liu
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  2. S.L. Gu
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  3. J.D. Ye
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  5. W. Liu
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Correspondence to S.L. Gu.

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64.70.Kg; 81.15.Gh; 81.40.Rs

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Liu, S., Gu, S., Ye, J. et al. Room-temperature ferromagnetism in Mn-N Co-doped p-ZnO epilayers by metal-organic chemical vapor deposition. Appl. Phys. A 91, 535–539 (2008). https://doi.org/10.1007/s00339-008-4444-z

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  • DOI: https://doi.org/10.1007/s00339-008-4444-z

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