Magnetic and structural properties of transition metal doped zinc-oxide nanostructures

We report on the magnetic and structural properties of two types of nanostructures doped with Co or Mn, namely, ZnO nanowires and colloidal ZnO nanocrystals. Electron paramagnetic resonance (EPR) spectra have been measured and analysed to extract information on the incorporation of the ions in the l...

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Bibliographic Details
Published in:	Physica Status Solidi (b) Vol. 246; no. 4; pp. 766 - 770
Main Authors:	Ankiewicz, Amélia O., Gehlhoff, Wolfgang, Martins, Joana S., Pereira, Ângela S., Pereira, Sérgio, Hoffmann, Axel, Kaidashev, Evgeni M., Rahm, Andreas, Lorenz, Michael, Grundmann, Marius, Carmo, Maria C., Trindade, Tito, Sobolev, Nikolai A.
Format:	Journal Article
Language:	English
Published:	Berlin WILEY-VCH Verlag 01-04-2009 WILEY‐VCH Verlag Wiley-VCH
Subjects:	61.72.Vv 68.65.La 75.50.Pp 76.30.Fc 81.07.Bc Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Electron paramagnetic resonance and relaxation Equations of state, phase equilibria, and phase transitions Exact sciences and technology Magnetic properties and materials Magnetic properties of nanostructures Magnetic resonances and relaxations in condensed matter, mössbauer effect Physics Specific phase transitions Structural transitions in nanoscale materials Lattice distortion Phase transformations Core shell structure Doping Surface treatments Manganese additions Nanostructures Coatings Impurity site Wurtzite structure Structure modification Zinc oxide Cobalt additions Nanowires Electron paramagnetic resonance Nanocrystal Magnetic properties
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Summary:	We report on the magnetic and structural properties of two types of nanostructures doped with Co or Mn, namely, ZnO nanowires and colloidal ZnO nanocrystals. Electron paramagnetic resonance (EPR) spectra have been measured and analysed to extract information on the incorporation of the ions in the lattice. A detailed analysis by means of simulations of the experimental EPR spectra confirms that the transition metal (TM) ions were mainly incorporated as TM2+, occupying the Zn2+ sites in the wurtzite structure of ZnO. Furthermore, for both types of nanostructures, the EPR spectra are composed of more than one signal, revealing locally distorted environments or core‐shell structures, proved by surface modifications via inorganic coatings. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Bibliography:	SANDiE Network of Excellence istex:320BE6036B643817A545B2494AEB4A5364E7218B ArticleID:PSSB200880581 ark:/67375/WNG-7LTGS20H-Q FCT - No. PTDS/FIS/72843/2006; No. SFRH/BD/21569/2005 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0370-1972 1521-3951
DOI:	10.1002/pssb.200880581