Damage accumulation and annealing behavior in high fluence implanted MgZnO

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Abstract

Molecular beam epitaxy grown MgxZn1-xO (x ≤ 0.3) layers were implanted at room temperature with 150 keV166Er+ions in a fluence range of 5 × 1015-3 × 1016cm-2. Evolution of ion-induced damage and structural changes were studied by a combination of Rutherford backscattering spectrometry, nuclear reaction analysis and time-of-flight elastic recoil detection analysis. Results show that damage production enhances in both Zn- and O-sublattices with increasing the Mg content in the MgZnO. However, MgZnO as well as pure ZnO exhibits a high degree of dynamic annealing and MgZnO can not be amorphized even at the highest ion fluence used. Annealing of heavily damaged ZnO leads to a strong surface erosion and thinning of the film. Increasing the Mg content suppresses the surface evaporation in high fluence implanted MgZnO but leads to a strong surface decomposition accompanied with a Mg-rich surface layer formation during post-implantation annealing. © 2011 Elsevier B.V. All rights reserved.

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Azarov, A. Y., Hallén, A., Svensson, B. G., Du, X. L., & Kuznetsov, A. Y. (2012). Damage accumulation and annealing behavior in high fluence implanted MgZnO. In Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms (Vol. 272, pp. 426–429). https://doi.org/10.1016/j.nimb.2011.01.115

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