Abstract
In this paper, α- Mn 2 O 3 thin films were fabricated by plasma-assisted molecular beam epitaxy on SrTiO 3 and Nb : SrTiO 3, respectively. The grown samples showed room temperature ferromagnetism (RFM) properties. All the experimental results manifested that the RFM properties in undoped thin films were induced by oxygen vacancies formed during the growth process. Even more, the ferromagnetism of thin films grown on Nb : SrTiO 3 were enhanced, and these results confirmed the fact that oxygen vacancies induced ferromagnetism. That is to say, more oxygen vacancies result the more unpaired electrons induced prominent abnormal spin causing ferromagnetism.
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