Tunable multiferroic properties in nanocomposite PbTiO 3 - CoFe 2O 4 epitaxial thin films

M. Murakami, K. S. Chang, M. A. Aronova, C. L. Lin, Ming H. Yu, J. Hattrick Simpers, M. Wuttig, I. Takeuchi, C. Gao, B. Hu, S. E. Lofland, L. A. Knauss, L. A. Bendersky

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Abstract

We report on the synthesis of PbTiO3 - CoFe2 O4 multiferroic nanocomposites and continuous tuning of their ferroelectric and magnetic properties as a function of the average composition on thin-film composition spreads. The highest dielectric constant and nonlinear dielectric signal was observed at (PbTiO3) 85 - (CoFe2 O4) 15, where robust magnetism was also observed. Transmission electron microscopy revealed a pancake-shaped epitaxial nanostructure of PbTiO3 on the order of 30 nm embedded in the matrix of CoFe2 O4 at this composition. Composition dependent ferroics properties observed here indicate that there is considerable interdiffusion of cations into each other.

Original languageEnglish (US)
Article number112901
JournalApplied Physics Letters
Volume87
Issue number11
DOIs
StatePublished - Sep 12 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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