The room-temperature ferromagnetic (RTFM) ordering with a very low carrier mobility occurs in polycrystalline Mn-doped ZnO film with δ ∼ 0.04. We successfully fabricated RTFM Zn0.96Mn0.04O:H film with a substantially improved carrier mobility (∼ 400% larger than that of the as-grown sample) through the hydrogen-implantation and a subsequent heat treatment.
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Park et al. (2007) studied this question.
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