Clustering in a precipitate-free GeMn magnetic semiconductor

URN to cite this document:: urn:nbn:de:bvb:355-epub-277606
DOI to cite this document:: 10.5283/epub.27760

Bougeard, Dominique ; Ahlers, S. ; Trampert, A. ; Sircar, N. ; Abstreiter, G.

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Date of publication of this fulltext: 27 Feb 2013 13:58

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Abstract

We present the first study relating structural parameters of precipitate-free Ge0.95Mn0.05 films to magnetization data. Nanometer-sized clusters--areas with increased Mn content on substitutional lattice sites compared to the host matrix--are detected in transmission electron microscopy analysis. The films show no overall spontaneous magnetization at all down to 2 K. The TEM and magnetization ...