Ferromagnetism in antiferromagnetic NiO-based thin films

Polycrystalline NiO-based thin films with Li or/and transition metal ions (V, Cr, Mn, Fe, Co, Cu, Zn) doping have been prepared by a sol-gel spin-coating method. Magnetization measurements reveal that V-, Fe-, and Mn-doped NiO thin films show obvious room-temperature ferromagnetic behaviors and ferr...

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Bibliographic Details
Published in:Journal of applied physics 2011-08, Vol.110 (4), p.043921-043921-4
Main Authors: Lin, Yuan-Hua, Zhan, Bin, Nan, Ce-Wen, Zhao, Rongjuan, Xu, Xiang, Kobayashi, M.
Format: Article
Language:English
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Summary:Polycrystalline NiO-based thin films with Li or/and transition metal ions (V, Cr, Mn, Fe, Co, Cu, Zn) doping have been prepared by a sol-gel spin-coating method. Magnetization measurements reveal that V-, Fe-, and Mn-doped NiO thin films show obvious room-temperature ferromagnetic behaviors and ferromagnetic properties can be enhanced by the Li co-doping. Microstructure and X-ray core-level photoemission spectra analysis indicate that the ferromagnetism was not from the impurity TM metal cluster and may be ascribed to double exchange coupling effects via Li-induced holes.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3626053