Issue 43, 2008
From the journal:

Journal of Materials Chemistry

Diluted magnetic semiconductors: Mn/Co-doped ZnO nanorods as case study†

Igor Djerdj,*a   Georg Garnweitner,b   Denis Arčon,*cd   Matej Pregelj,c   Zvonko Jagličićef  and  Markus Niederbergera  

* Corresponding authors

a Department of Materials, ETH Zürich, Wolfgang-Pauli-Strasse 10, Zürich, Switzerland
E-mail: igor.djerdj@mat.ethz.ch
Fax: +41 (0) 44 632 1101
Tel: +41 (0) 44 633 6707

b Institute for Particle Technology, TU Braunschweig, Volkmaroder Str. 5, Braunschweig, Germany

c Institute Jožef Stefan, Jamova 39, Ljubljana, Slovenia
E-mail: denis.arcon@ijs.si
Fax: +386 (0) 1477 3191
Tel: +386 (0) 1477 3492

d Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, Ljubljana, Slovenia

e Institute of Mathematics, Physics and Mechanics, Jadranska 19, Ljubljana, Slovenia

f Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova 2, Ljubljana, Slovenia

Abstract

The structure and the magnetic properties of 3 and 5 mol% (based on the starting concentrations) Co- and Mn-doped ZnO nanorods, synthesized by a straightforward and experimentally simple nonaqueous sol–gel route based on benzyl alcohol as solvent, have been investigated by various characterization techniques, including X-ray diffraction with Rietveld refinement, high-resolution transmission electron microscopy, selected area electron diffraction, energy dispersive X-ray spectroscopy, magnetization measurements and electron paramagnetic resonance. The doped as-synthesized ZnO nanocrystals retain the wurtzite structure with a morphology in the form of nanorods grown along the [001] direction, whose dimensional parameters as well as degree of agglomeration depend on the type and level of doping. The Co-doped ZnO powders are ferromagnetic with a Curie temperature exceeding room temperature. Conversely, the Mn-doped samples show antiferromagnetic correlations with a possible transition to an antiferromagnetic ground state below TN = 10 K. The results suggest that the magnetic ground state is extremely sensitive to the type of dopant, which is in agreement with previous studies.

Graphical abstract: Diluted magnetic semiconductors: Mn/Co-doped ZnO nanorods as case study

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Article information

DOI
https://doi.org/10.1039/B808361D
Article type
Paper
Submitted
19 May 2008
Accepted
27 Aug 2008
First published
03 Oct 2008

J. Mater. Chem., 2008,18, 5208-5217

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Diluted magnetic semiconductors: Mn/Co-doped ZnO nanorods as case study

I. Djerdj, G. Garnweitner, D. Arčon, M. Pregelj, Z. Jagličić and M. Niederberger, J. Mater. Chem., 2008, 18, 5208 DOI: 10.1039/B808361D

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