@ARTICLE{Takagaki_jap_2010, author = {Takagaki, Y. and J. L\"ahnemann and Jenichen, B. and Herfort, J. and Herrmann, C. and Jahn, U.}, title = {Distribution of structural domains in {MnAs} layers grown on {GaAs} substrates}, journal = J. Appl. Phys., year = {2010}, volume = {108}, pages = {123510}, number = {12}, abstract = {Electron backscatter diffraction is utilized to determine the distribution of coexisting structural domains in MnAs layers prepared on GaAs substrates. In a layer grown on a GaAs(111)B substrate using solid phase epitaxy, the structural domains roughly correspond to the morphological features of the surface. The domains are, in contrast, considerably larger in size than the surface roughness when the substrate is GaAs(113)A. We examine the role of the freedom in in-plane crystalline alignment for causing such a difference using a numerical model. In a layer grown at an extraordinary high temperature (600 °C) on a GaAs(111)B substrate, (0001) and (1math0l) orientations are interwoven. While the (0001) component is present mainly as thin flat films, a mixture of all the components forms thick elongated islands in the surrounding of the films. Consequences of such an inhomogeneity on the magnetic and electrical properties of the layer are discussed.}, doi = {10.1063/1.3520654}, keywords = {electrical resistivity; electron backscattering; electron diffraction; III-V semiconductors; magnetic epitaxial layers; magnetic hysteresis; magnetic semiconductors; magnetic transitions; manganese compounds; semiconductor epitaxial layers; semiconductor growth; solid phase epitaxial growth; surface morphology; surface roughness}, numpages = {7}, publisher = {AIP} }