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Wurtzite (Ga,Mn)As nanowire shells with ferromagnetic properties
J Sadowski1, S Kret2, A Šiušys2
1MAX-IV Laboratory, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden. janusz.sadowski@maxiv.lu.se and Department of Physics and Electrical Engineering, Linnaeus University, SE-391 82 Kalmar, Sweden and Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02-668 Warsaw, Poland.
Abstract:
(Ga,Mn)As having a wurtzite crystal structure was coherently grown by molecular beam epitaxy on the {1100} side facets of wurtzite (Ga,In)As nanowires and further encapsulated by (Ga,Al)As and low temperature GaAs. For the first time, a truly long-range ferromagnetic magnetic order is observed in non-planar (Ga,Mn)As, which is attributed to a more effective hole confinement in the shell containing Mn by the proper selection/choice of both the core and outer shell materials.
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