Defect-induced magnetism in chemically synthesized nanoscale sheets of MgO

Ben M. Maoz, Einat Tirosh, Maya Bar Sadan, Gil Markovich

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

Highly defective MgO nanosheets were prepared by a colloidal synthesis and exhibited low-temperature ferromagnetism which was significantly larger that the magnetization potentially obtainable from the low transition-metal impurity concentration. Electron paramagnetic resonance experiments confirmed that the magnetization did not significantly involve impurities and that the nanosheets consisted of strongly interacting spin clusters which disappeared upon high-temperature annealing. These spins were concentrated along extended defects, possibly as unpaired electrons trapped at oxygen vacancies.

Original languageEnglish
Article number161201
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number16
DOIs
StatePublished - 6 Apr 2011
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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