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Title: Characterization of L21 order in Co2FeSi thin films on GaAs
Authors: Jenichen, B.Hentschel, T.Herfort, J.Kong, X.Trampert, A.Zizak, I.
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Issue Date: 2013
Published in: Journal of Physics: Conference Series Vol. 471 (2013), No. 1
Publisher: Bristol : Institute of Physics Publishing
Abstract: Co2FeSi/GaAs(110) and Co2FeSi/GaAs(-1-1-1)B hybrid structures were grown by molecular-beam epitaxy (MBE) and characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The films contain inhomogeneous distributions of ordered L21 and B2 phases. The average stoichiometry could be determined by XRD for calibration of the MBE sources. Diffusion processes lead to inhomogeneities, influencing long-range order. An average L21 ordering of up to 65% was measured by grazing-incidence XRD. Lateral inhomogeneities of the spatial distribution of long-range order in Co2FeSi were imaged using dark-field TEM with superlattice reflections and shown to correspond to variations of the Co/Fe ratio.
Keywords: Characterization; High resolution transmission electron microscopy; Molecular beam epitaxy; Transmission electron microscopy; X ray diffraction; Dark-field tem; Diffusion process; Grazing incidence; Hybrid structure; Inhomogeneities; Inhomogeneous distribution; Long range orders; Superlattice reflections; Carbon dioxide
DDC: 530
License: CC BY 3.0 Unported
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