Defect-induced room temperature ferromagnetism in B-doped ZnO

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Yilmaz S., Nisar J., Atasoy Y., McGlynn E., Ahuja R., PARLAK M., ...More

CERAMICS INTERNATIONAL, vol.39, no.4, pp.4609-4617, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 4
  • Publication Date: 2013
  • Doi Number: 10.1016/j.ceramint.2012.11.060
  • Journal Name: CERAMICS INTERNATIONAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4609-4617
  • Keywords: ZnO:B, Photoluminescence, Ferromagnetism, First-principle calculation, THIN-FILMS, OPTICAL-PROPERTIES, MICROSTRUCTURE, TRANSITION, FABRICATION, EXCHANGE
  • Middle East Technical University Affiliated: Yes

Abstract

ZnO microrods were grown on glass substrates by the spray pyrolysis method and boron was doped into the ZnO microrods by diffusion. X-ray diffraction results confirmed that the incorporation of B leads to a slight reduction in the deposit texture. Scanning electron microscopy measurements showed that the morphology of the ZnO samples changed from a microrod to nanocrystalline structure with B-doping. Photoluminescence data indicate that B-doping leads to a relative increase of the unstructured green band intensity. Magnetic measurements revealed that B-doped ZnO samples exhibited room temperature ferromagnetism related to defects, in agreement with first principles theoretical calculations. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.