Effect of Mn concentration and growth temperature on nanostructures and magnetic properties of Ge1-xMnx grown on Si

Yong Wang, Ya Wang, Faxian Xiu, Hongyi Xu, De Li, Xufeng Kou, Kang L. Wang, Ajey P. Jacob, Jin Zou

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The nanostructures and magnetic properties of Ge1-xMn x thin films grown on Si substrates by molecular beam epitaxy, with different nominal Mn concentrations (1-4%) and different growth temperatures, have been systematically investigated by transmission electron microscopy and superconducting quantum interference device. It was discovered that when Ge 1-xMnx 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.

Original languageEnglish
Pages (from-to)3034-3039
Number of pages6
JournalJournal of Crystal Growth
Volume312
Issue number20
DOIs
Publication statusPublished - 2010 Oct 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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