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Magnetic and structural properties of transition metal doped zinc‐oxide nanostructures
Author(s) -
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.
Publication year - 2009
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200880581
Subject(s) - electron paramagnetic resonance , wurtzite crystal structure , materials science , zinc , nanostructure , doping , transition metal , ion , nanocrystal , spectral line , metal , oxide , nanotechnology , crystallography , chemical physics , chemistry , nuclear magnetic resonance , optoelectronics , metallurgy , physics , catalysis , biochemistry , organic chemistry , astronomy
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 TM 2+ , occupying the Zn 2+ 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)