Resonant X-ray diffraction of self-assembled epitaxial systems: From direct to complementary chemical information

Abstract

Abstract. In this work we depict schematically the use of resonant (anomalous) X-ray diffraction as a tool to directly probe strain and composition of self-assembled semiconductor islands. By employing a direct analysis at the Eu L 3 edge its composition gradient is quantified for EuTe:SnTe capped islands. Projection maps are proposed to visualize the results, providing an alternative capability to infer quantum dot properties. A more complex methodology is applied to the study of InP:GaAs islands, in which complementary anomalous measurements are performed. For this system the number of samples analyzed allows us to extract the activation energy for Ga adatoms diffusion from the substrate to the islands.

Advances in Structural and Morphological Characterization of Thin Magnetic Films: A Review

“…Dealing with magnetic materials it is especially important to probe L 2,3 /M 4,5 edges of transition/rare-earths metals because they involve transitions to 3d and 4f states respectively, which are involved in the magnetic response [183][184][185][186][187]. As an example of how it helps in thin-film characterization, we take an example of YMn 0.5 Fe 0.5 O 3 epitaxial thin films [187].…”