Hoffmann, Frank and Woltersdorf, Georg and Wegscheider, Werner and Einwanger, Andreas and Weiss, Dieter and Back, Christian (2009) Mapping the magnetic anisotropy in (Ga,Mn)As nanostructures. Physical Review B (PRB) 80, p. 54417.
Anisotropic strain relaxation in (Ga,Mn)As nanostructures was studied combining time-resolved Kerr microscopy and ferromagnetic resonance techniques. Local resonance measurements on individual narrow stripes patterned along various crystallographic directions reveal that the easy axis of the magnetization can be forced perpendicular to the strain relaxation direction. Spatially resolved measurements on disk-shaped and rectangular (Ga,Mn)As structures allow us to directly visualize these local changes in the magnetic anisotropy. We show that the strain-induced edge anisotropy allows for an effective control of the coercive field in stripe structures.
|Date:||28 August 2009|
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back|
Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen|
|Keywords:||coercive force, ferromagnetic resonance, gallium arsenide, magnetic anisotropy, manganese compounds, nanostructured materials, semimagnetic semiconductors|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||17 Sep 2009 09:12|
|Last Modified:||20 Jul 2011 21:43|