Evidence for magnetism due to oxygen vacancies in Fe-doped HfO2 thin films

Evidence for magnetism due to oxygen vacancies in Fe-doped HfO2 thin films

Fe-doped HfO2 thin films are room temperature ferromagnetic. In comparison with results of the undoped HfO2 films, it seems that the Fe doping is not the main cause for the ferromagnetism but only acts as a catalyst. Experimental results of oxygen annealing and vacuum heat treatments have proven tha...

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Bibliographic Details
Published in:Applied physics letters Vol. 89; no. 4
Main Authors: Hong, Nguyen Hoa, Poirot, Nathalie, Sakai, Joe
Format: Journal Article
Language:English
Published: American Institute of Physics 24-07-2006
Subjects:
Physics
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Summary:Fe-doped HfO2 thin films are room temperature ferromagnetic. In comparison with results of the undoped HfO2 films, it seems that the Fe doping is not the main cause for the ferromagnetism but only acts as a catalyst. Experimental results of oxygen annealing and vacuum heat treatments have proven that in this family of compounds, magnetism might originate from oxygen vacancies or defects. Removing oxygen enhances the magnetic moment, while reversibly filling up oxygen vacancies can destroy the ferromagnetic ordering of the system.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2236105