Title :
Effect of Magnetic Field on the Magnetic Domain Structure of MnAs Film on GaAs
Author :
Kim, Jin Bae ; Lee, Y.P. ; Ryu, Kwang Sun ; Shin, S.C. ; Akinaga, Hiroyuki ; Kim, Kwan Weon
Author_Institution :
Quantum Photonic Sci. Res. Center & Dept. of Phys., Hanyang Univ., Seoul
Abstract :
We have observed the magnetic domain evolution under an external magnetic field in an epitaxial MnAs film on GaAs(001) by magnetic force microscopy. Owing to the strain involved, the ferromagnetic alpha-MnAs and the paramagnetic beta-MnAs phases coexist as self-aligned stripes at room temperature. It was found that a complex magnetic domain structure appeared in the ferromagnetic alpha-phase region at the demagnetized state (H=0 Oe). As the magnetic field increased, the magnetic domain structure was gradually changed, and reached a completely saturated state at H=600 Oe. Especially, at H=300 Oe, the observed magnetic domain wall distribution is well matched with the topographical shape
Keywords :
III-V semiconductors; arsenic alloys; gallium arsenide; magnetic domain walls; magnetic epitaxial layers; magnetic force microscopy; manganese alloys; GaAs; MnAs; magnetic domain structure; magnetic domain wall distribution; magnetic field effect; magnetic force microscopy; magnetic thin films; Demagnetization; Gallium arsenide; Magnetic domain walls; Magnetic domains; Magnetic field induced strain; Magnetic films; Magnetic force microscopy; Magnetic forces; Paramagnetic materials; Temperature; Magnetic domains; magnetic force microscopy; magnetic thin films;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.878404
