Role of defects in magnetic properties of Fe-doped SnO2 films fabricated by the Sol - Gel method

Xue Yun Zhou, Shi Hui Ge, Xiu Feng Han, Ya Lu Zuo, Yu Hua Xiao, Zhen Chao Wen, Li Zhang, Ming Jie Li

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    This paper obtains the room temperature ferromagnetism in Sn 1 - x FexO2 films fabricated by the Sol - Gel method. X-ray diffraction results show that Fe doping inhibits the growth of SnO2 and Fe3+ ions occupy the Sn sites. The measurement of resistance excludes the free carrier inducing ferromagnetism. Moreover, the temperature dependence of magnetization has been better fitted by the Curie-Weiss law and bound magnetic polaron (BMP) theory. An enhancement of ferromagnetism is achieved by annealing the samples with x 7.1% in H 2, and a decrease of oxygen flow rate. All these results prove that the BMP model depending on defects can explain ferromagnetism in diluted magnetic oxides.

    Original languageEnglish
    Pages (from-to)4025-4029
    Number of pages5
    JournalChinese Physics B
    Volume18
    Issue number9
    DOIs
    Publication statusPublished - 2009 Nov 3

    Keywords

    • BMP model
    • Defects
    • Diluted magnetic oxides

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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