Magnetic and electrical properties of single-crystalline mn-doped Ge nanowires

Han Kyu Seong, Ungkil Kim, Eun Kyung Jeon, Tae Eon Park, Hwangyou Oh, Tae Hyun Lee, Ju Jin Kim, Heon Jin Choi, Jae Young Kim

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22 Citations (Scopus)

Abstract

We report on synthesis of Mn-doped Ge nanowires and their magnetic and electrical properties. The nanowires were grown on the silicon substrate by vapor-liquid-solid mechanism using Au as catalyst and GeCl4 and MnCl2 as precursor. Anomalous X-ray scattering measurement makes it clear that Mn atoms are substitutionally incorporated with the diamond network of host Ge sites. Superconducting quantum interference device characterization indicated that the nanowires possess ferromagnetism up to room temperature. X-ray magnetic circular dichroism spectra at Mn L2,3-edges showed that doped Mn has local spin moment with the 3d5 electronic configuration above room temperature, meaning that the ferromagnetism originates from doped Mn2+ ions. Electrical characterization of a nanowire field effect transistor revealed the improved p-type behavior with hole mobility of 4.95 cm2/V.s.

Original languageEnglish
Pages (from-to)10847-10852
Number of pages6
JournalJournal of Physical Chemistry C
Volume113
Issue number25
DOIs
Publication statusPublished - 2009 Jun 25

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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    Seong, H. K., Kim, U., Jeon, E. K., Park, T. E., Oh, H., Lee, T. H., Kim, J. J., Choi, H. J., & Kim, J. Y. (2009). Magnetic and electrical properties of single-crystalline mn-doped Ge nanowires. Journal of Physical Chemistry C, 113(25), 10847-10852. https://doi.org/10.1021/jp806244g