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Magnetic, structural, electronic, and optical investigations of Ti1−xMnxO2 films

Published online by Cambridge University Press:  31 July 2012

Sudesh Sharma ,
Sujeet Chaudhary  and
Subhash Chand Kashyap
Sudesh Sharma
Affiliation:
Department of Physics, University of Petroleum & Energy Studies, Dehradun, Uttarakhand 248007, India
Sujeet Chaudhary*
Affiliation:
Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India
Subhash Chand Kashyap
Affiliation:
Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India
*
a)Address all correspondence to this author. e-mail: sujeetc@physics.iitd.ac.in
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Abstract

Observation of room temperature ferromagnetism (RTFM) is reported in polycrystalline thin films of Ti1−xMnxO2 (x = 0.10 and 0.15) synthesized by spray pyrolysis technique on fused quartz substrates. Our experimental results clearly suggest partial incorporation of manganese (Mn) in titanium dioxide (TiO2) lattice up to certain extent and rest of the Mn ions are consumed to form secondary Mn-related phase such as manganese oxide (Mn3O4). The observed weak ferromagnetic ordering at room temperature in the films is established to be due to incorporation of Mn in TiO2matrix rather than the presence of other secondary phases since none of the Mn or Ti/Mn oxide phase is ferromagnetic at room temperature. Bound magnetic polaron model is invoked to explain the observed ferromagnetism in these highly resistive films.

Keywords

Spray pyrolysisSpintronicFerromagnetism
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 3: Focus Issue: Titanium Dioxide Nanomaterials , 14 February 2013 , pp. 529 - 534
Copyright
Copyright © Materials Research Society 2012

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References

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