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Defect-induced magnetism in chemically synthesized nanoscale sheets of MgO

Ben M. Maoz, Einat Tirosh, Maya Bar Sadan, and Gil Markovich
Phys. Rev. B 83, 161201(R) – Published 6 April 2011
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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.

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  • Received 24 February 2011

DOI:https://doi.org/10.1103/PhysRevB.83.161201

©2011 American Physical Society

Authors & Affiliations

Ben M. Maoz1, Einat Tirosh1, Maya Bar Sadan2, and Gil Markovich1,*

  • 1School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Science, Tel Aviv University, Tel Aviv IL-69978, Israel
  • 2Institute of Solid State Research, Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons-Research Centre Jülich GmbH, D-52425 Jülich, Gernmany

  • *Corresponding author: gilmar@post.tau.ac.il

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Issue

Vol. 83, Iss. 16 — 15 April 2011

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