%0 Journal Article
%K pulsed laser deposition
%K nanowires
%K nanostructured materials
%K Ferromagnetism
%K Single crystals
%K Circular shape
%K Octahedral
%A L Mohaddes-Ardabili
%A H Zheng
%A Q Zhan
%A S.Y Yang
%A Ramamoorthy Ramesh
%A L Salamanca-Riba
%A M Wuttig
%A S.B Ogale
%A X Pan
%B Applied Physics Letters
%D 2005
%G eng
%P 1-3
%R 10.1063/1.2128480
%T Size and shape evolution of embedded single-crystal α -Fe nanowires
%V 87
%X The size and shape evolution of embedded ferromagnetic α -Fe nanowires is discussed. The α -Fe nanowires are formed by pulsed-laser deposition of La0.5 Sr0.5 FeO3-x on single-crystal SrTiO3 (001) substrate in reducing atmosphere. The average diameter of the nanowires increases from d≈4 to 50 nm as the growth temperature increases from T=560 to 840 °C. Their in-plane shape evolves from circular to octahedral and square shape with [110] facets dominating as the growth temperature increases. A fitting to a theoretical calculation shows that the circular shape is stable when the diameter of the nanowires is smaller than 8 nm. © 2005 American Institute of Physics.