doi: 10.1557/jmr.2013.279, Published by Materials Research Society with Cambridge University Press, 15 October 2013.
This article has been retracted at the request of the authors.
Figures 3 and 4 were reproduced from the PhD thesis of Dr Felix Börrnert without explicit request, permission or acknowledgement. This was an oversight by the corresponding author, Dr Rümmeli. The rest of the paper is unaffected and the results stand as presented.