2008/01/30 by Akira Sugawara, Hiroto Kasai, H. Kasai +10
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Magnetic properties of thin films #ZnO doping and properties #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.100.047202
published as Physical Review Letter, 100, 047202 (2008) · 5 pages, 4 figures
openalex publication_date 2008/01/30 · arxiv created 2008/02/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report experimental and theoretical studies of magnetic domain walls in an in-plane magnetized (Ga,Mn)As dilute moment ferromagnetic semiconductor. Our high-resolution electron holography technique provides direct images of domain wall magnetization profiles. The experiments are interpreted based on microscopic calculations of the micromagnetic parameters and Landau-Lifshitz-Gilbert simulations. We find that the competition of uniaxial and biaxial magnetocrystalline anisotropies in the film is directly reflected in orientation dependent wall widths, ranging from approximately 40 to 120 nm. The domain walls are of the Néel type and evolve from near-90 degrees walls at low temperatures to large angle [11[over ]0]-oriented walls and small angle [110]-oriented walls at higher temperatures.