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Multiferroic properties of Dy modified BiFeO3 thin films in comparison with Tb modified BiFeO3 thin films

Published online by Cambridge University Press:  31 January 2011

V.R. Palkar ,
R. Anisha ,
R. Pinto  and
S. Bhattacharya
V.R. Palkar*
Affiliation:
Tata Institute of Fundamental Research, Mumbai 400005, India
R. Anisha
Affiliation:
Indian Institute of Technology Bombay, Mumbai 400076, India
R. Pinto
Affiliation:
Indian Institute of Technology Bombay, Mumbai 400076, India
S. Bhattacharya
Affiliation:
Tata Institute of Fundamental Research, Mumbai 400005, India
*
a)Address all correspondence to this author. e-mail: palkar@tifr.res.in
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Abstract

Coexistence of ferroelectric and ferromagnetic order parameters was observed at room temperature in Bi0.6Dy0.3La0.1FeO3 thin films grown on Pt/TiO2/SiO2/Si substrates using a pulsed laser deposition technique similar to that for Bi0.6Tb0.3La0.1FeO3. The coexistence of ferroelectric and magnetic domains in specific spatial area of the thin film was also confirmed by scanning probe imaging. As expected, the magnetization values obtained for Bi0.6Dy0.3La0.1FeO3 bulk and thin films were higher than those of Bi0.6Tb0.3La0.1FeO3 bulk and polycrystalline thin films because the magnetic moment of Dy is higher than that of Tb. However, preferentially oriented thin films of Bi0.6Tb0.3La0.1FeO3 exhibit much higher magnetization values. It is speculated that structural alignment caused by stress developed during deposition of these films could be responsible for enhancement in magnetization.

Keywords

FerroelectricityFerromagneticFilm
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 8 , August 2007 , pp. 2068 - 2073
Copyright
Copyright © Materials Research Society 2007

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References

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