Magnetic silicon nanoparticles

Priyanka Manchanda, Pankaj Kumar, Balamurugan Balasubramanian, Pinaki Mukherjee, Arti Kashyap, David J. Sellmyer, Ralph Skomski

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Prospects for diamond-structured magnetic Si are investigated experimentally, by model calculations, and numerically. Our theoretical analysis, using bond-orbital, Vienna ab-initio simulation package, and SIESTA calculations, suggest that some diamond-Si imperfection may carry a magnetic moment. In particular, for tetrahedral Si5 clusters, we calculate a magnetic moment of 4 μB per cluster. These moments are more likely to be observed in nanoparticles, as compared with thin films, due to the larger surface-to-volume ratios of the former and to their more versatile atomic surface structure. Experimentally, we have prepared Si nanoparticles by cluster deposition and found a small magnetization, of 2.9 emu/cm3 at 10 K.

Original languageEnglish (US)
Article number6971444
JournalIEEE Transactions on Magnetics
Volume50
Issue number11
DOIs
StatePublished - Nov 1 2014

Keywords

  • Exchange
  • impurity magnetism
  • local magnetic moments
  • magnetic nanoparticles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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