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arXiv · 1106.5831

Hole mediated ferromagnetism in Cu-doped ZnO thin films

Abhinav Pratap Singh·B. -G. Park·Ik-Jae Lee·Kyu Joon Lee·Myung-Hwa Jung·Jinhee Kim·J. -Y. Kim
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Abstract

We report the successful synthesis of ZnO:Cu thin films doped with holes, resulting in room temperature ferromagnetism. Hole doping is achieved by As-diffusion from the GaAs substrate into ZnO films, assisted by thermal annealing. The As-diffusion is probed with the help of x-ray absorption spectra collected at the As K-edge which show enhanced signature of diffusion in the annealed samples. Introduction of holes, due to the As doping, in ZnO films is further evidenced by the Cu L3,2-edge spectra. XMCD and magnetic measurements show that the ferromagnetic interaction between doped Cu ions is enhanced after hole doping.

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Abhinav Pratap Singh, B. -G. Park, Ik-Jae Lee, Kyu Joon Lee, Myung-Hwa Jung, Jinhee Kim, J. -Y. Kim. 2011-06-29. Hole mediated ferromagnetism in Cu-doped ZnO thin films. https://arxiv.org/abs/1106.5831

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