Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1792984 | Journal of Crystal Growth | 2010 | 6 Pages |
Abstract
The nanostructures and magnetic properties of Ge1âxMnx thin films grown on Si substrates by molecular beam epitaxy, with different nominal Mn concentrations (1â4%) and different growth temperatures, have been systematically investigated by transmission electron microscopy and superconducting quantum interference device. It was discovered that when Ge1âxMnx thin films were grown at 70 °C, with increase in Mn concentration, Mn-rich tadpole shaped clusters started to nucleate at 1% Mn and become dominate in the entire film at 4% Mn. While for the thin films grown at 150 °C, tadpoles was firstly seen in the film with 1% Mn and subsequently Mn-rich secondary precipitates became dominant. The magnetic properties show specific features, which are mainly related to the nature and amount of Mn-rich clusters/precipitates within these thin films.
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Authors
Ya Wang, Faxian Xiu, Yong Wang, Hongyi Xu, De Li, Xufeng Kou, Kang L. Wang, Ajey P. Jacob, Jin Zou,