MnGe magnetic nanocolumns and nanowells

Faxian Xiu, Yong Wang, Kin Wong, Yi Zhou, Xufeng Kou, Jin Zou, Kang L. Wang

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

We report a 'superlattice' growth method to produce well-aligned magnetic MnGe nanocolumns and nanowells by using low-temperature molecular-beam epitaxy. Both structural and magnetic properties show strong evidence of Mn 5Ge3 precipitates and lattice-coherent nanostructures with different blocking temperatures. Magnetotransport measurements reveal positive and negative magnetoresistances for the nanowells and nanocolumns, respectively. This distinction can be explained by different spin scattering mechanisms under magnetic fields. Our results suggest a new growth strategy to achieve reproducible MnGe nanostructures, which facilitates the development of Ge-based spintronics and magnetoelectronics devices.

Original languageEnglish
Article number255602
JournalNanotechnology
Volume21
Issue number25
DOIs
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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