Room Temperature Ferromagnetism in Carbon-doped ZnO – A New Type of DMS!

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Using first-principles calculation based on DFT, we predict carbon-doped ZnO can be a room temperature dilute magnetic semiconductor. Experiment work on PLD grown carbon-doped ZnO films demonstrated that carbon-doped ZnO is indeed ferromagnetic with high Curie temperature. DMSs are traditionally produced by substitutional doping of transition metals at cation site. Our work demonstrates that room temperature ferromagnetism can be generated by substutional doping at anion site with 2p light elements (with d or f electrons). It opens a new direction in searching for useful DMS materials. See Phys. Rev. Lett. 99, 127201 (2007) for details, and http://physicsworld.com/cws/article/news/31381 for a report by physicsworld.com