This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1063/1.4972956 in citations.
Please use the identifier: http://hdl.handle.net/2128/17236 in citations.
MnO nanoparticles as the cause of ferromagnetism in bulk dilute Mn-doped ZnO
MnO nanoparticles as the cause of ferromagnetism in bulk dilute Mn-doped ZnO
We show that the observed ferromagnetic behavior of ZnO lightly doped with Mn coincides with the presence of MnO nanoparticles, whereas cluster-free Mn doped ZnO behaves paramagnetically. This conclusion is reached by a study of the structural and magnetic properties of powdered samples of (Mnx,Zn1–...
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Personal Name(s): | Lançon, Diane (Corresponding author) |
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Nilsen, Gøran J. / Wildes, Andrew R. / Nemkovski, Kirill / Huang, Ping / Fejes, Dóra / Rønnow, Henrik M. / Magrez, Arnaud | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Applied physics letters, 109 (2016) 25, S. 252405 - |
Imprint: |
Melville, NY
American Inst. of Physics
2016
|
DOI: |
10.1063/1.4972956 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) FRM II / MLZ |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/17236 in citations.
We show that the observed ferromagnetic behavior of ZnO lightly doped with Mn coincides with the presence of MnO nanoparticles, whereas cluster-free Mn doped ZnO behaves paramagnetically. This conclusion is reached by a study of the structural and magnetic properties of powdered samples of (Mnx,Zn1–x)O with x ≤ 0.033 using polarized neutron scattering. Two types of samples were synthesized via, respectively, a solid state method and the decomposition of hydrozincite. Further characterization has been performed using standard X-ray diffraction and magnetization measurements. The results show evidence for the formation of MnO nanoparticles in the highest doped samples for both synthesis methods, with a ferromagnetic behavior attributed to uncompensated Mn2+ in the MnO nanoparticles. The lower Mn-doped samples showed no evidence for structural segregation or magnetic correlations and showed only a paramagnetic behaviour. |