Abstract
Single-crystalline AlGaN:Mn nanotubes (see figure) with a an outer diameter less than 200 nm and a length of a few micrometers are prepared by a chloride-based chemical vapor deposition process. The nanotubes exhibit room-temperature ferromagnetism without evidence of a ferromagnetic transition, showing that the structural and compositional modulation of 1D nanostructures could open up a way of exploring new classes of diluted magnetic semiconductors.
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