The mosaic structure features (such as lateral and vertical coherence lengths, tilt and twist angle, and heterogeneous strain) and dislocation densities (edge and screw type dislocations) of hexagonal AlInN layers were determined by HRXRD measurements.
The vertical and lateral coherence lengths, heterogeneous strain, and degree of mosaicity expressed by the tilt and twist angles are important parameters in characterizing the quality of the epitaxial films [8,9,22-30].
Because of a small vertical correlation length and a heterogeneous strain along the c-axis causes a broadening of the Bragg reflections in the 2[theta]-[omega]-scan (or radial-scan direction) of the symmetric reflections.
The mosaic structures parameters (such as lateral and vertical coherence lengths, tilt and twist angle, and heterogeneous strain) and dislocation densities (edge and screw type dislocations) of the AlInN epilayers and GaN template layers were investigated by using HR-XRD measurements.
Going deeper into the anisotropic behavior, more specifically, into the highly heterogeneous strain
gradient in plane 1-3 of the material when loaded in direction 3, SEM micrographs of nonloaded specimens of the PVC foam were taken.
The Collaborative Cross (CC) is a carefully planned and controlled mouse recombinant inbreeding program that began in 2005 with eight genetically heterogeneous strains
. Upon its expected completion in about four years, 1,000 lines closely modeling the breadth of human genetic diversity will have been generated.