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arXiv · 0803.0042

Combinatorial discovery of a lead-free morphotropic phase boundary in a thin-film piezoelectric perovskite

S. Fujino·M. Murakami·A. Varatharajan·S. -H. Lim·V. Nagarajan·C. J. Fennie·M. Wuttig·L. Salamanca-Riba·I. Takeuchi
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Abstract

We report on the discovery of a lead-free morphotropic phase boundary in Sm doped BiFeO3 with a simple perovskite structure using the combinatorial thin film strategy. The boundary is a rhombohedral to pseudo-orthorhombic structural transition which exhibits a ferroelectric (FE) to antiferroelectric (AFE) transition at approximately Bi0.86Sm0.14FeO3 with dielectric constant and out-of-plane piezoelectric coefficient comparable to those of epitaxial (001) oriented Pb(Zr,Ti)O3 (PZT) thin films at the MPB. The discovered composition may be a strong candidate of a Pb-free piezoelectric replacement of PZT.

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S. Fujino, M. Murakami, A. Varatharajan, S. -H. Lim, V. Nagarajan, C. J. Fennie, M. Wuttig, L. Salamanca-Riba, I. Takeuchi. 2008-03-01. Combinatorial discovery of a lead-free morphotropic phase boundary in a thin-film piezoelectric perovskite. https://doi.org/10.1063/1.2931706

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