Le Thi Giang, Nguyen Manh An

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Abstract

Abstract: High resolution - transmission electron microscopy (HR-TEM), along with Reflection High-Energy Electron Diffraction (RHEED) and Laser pulse atom probe tomography (LP- APT) were used to investigate the growth kinetics of Ge1-xMnx nanocolumn on Ge(001) and the mechanism of Ge1-xMnx nanocolumn formation. The results evidence that during the deposition of Ge1-xMnx film, Mn atoms diffuse into the Ge matrix to form Mn-rich regions and the upward segregation of Mn atoms along the [001] direction is the origin of the Mn concentration enrichment inside the nanocolumns.

Keywords: Diluted magnetic semiconductors, nanocolumns, Ge3Mn5 clusters, Mn segregation.

References

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