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

5 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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