Magnetic domains in III-V magnetic semiconductors

Recent progress in the theoretical understanding of magnetic anisotropy and stiffness in III-V magnetic semiconductors is exploited for predictions of magnetic domain characteristics and methods of their tuning. We evaluate the width and the energy of domain walls as well as the period of stripe domains in perpendicular films. The computed stripe width $W=1.1\mathrm{}\hspace{0.5em}\mu \mathrm{m}$ for ${\mathrm{Ga}}_{0.957}{\mathrm{Mn}}_{0.043}\mathrm{As}/{\mathrm{In}}_{0.16}{\mathrm{Ga}}_{0.84}\mathrm{As}$ compares favorably to the experimental value $1.5\hspace{0.5em}\mu \mathrm{m},$ as determined by Shono et al. [Appl. Phys. Lett. 77, 1363 (2000)].