Publication Type:Journal Article
Source:Applied Physics Letters, Volume 87, Number 20, p.1-3 (2005)
Keywords:Circular shape, Ferromagnetism, nanostructured materials, nanowires, Octahedral, pulsed laser deposition, Single crystals
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  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.
cited By 15