Direct and converse piezoelectric responses at the nanoscale from epitaxial BiFeO3 thin films grown by polymer assisted deposition

Jose Manuel Vila-Fungueirino, Andres Gomez, Jordi Antoja-Lleonart, Jaume Gazquez, Cesar Magen, Beatriz Noheda, Adrian Carretero-Genevrier

OnderzoeksoutputAcademicpeer review

17 Citaten (Scopus)

Samenvatting

We use an original water-based chemical method to grow pure epitaxial BiFeO3 (BFO) ultra-thin films with excellent piezoelectric properties. Particularly, we show that this novel chemical route produces higher natural ferroelectric domain size distribution and coercive field compared to similar BFO films grown by physical methods. Moreover, we measured the d(33) piezoelectric coefficient of 60 nm thick BFO films by a direct approach, using Direct Piezoelectric Force Microscopy (DPFM). As a result, first piezo-generated charge maps of a very thin BFO layer were obtained applying this novel technology. We also performed a comparative study of the d(33) coefficients between standard PFM analysis and DPFM microscopy showing similar values i.e. 17 pm V-1 and 22 pC N-1, respectively. Finally, we proved that the directionality of the piezoelectric effect in BFO ferroelectric thin films is preserved at low thickness dimensions demonstrating the potential of chemical processes for the development of low cost functional ferroelectric and piezoelectric devices.

Originele taal-2English
Pagina's (van-tot)20155-20161
Aantal pagina's7
TijdschriftNanoscale
Volume10
Nummer van het tijdschrift43
DOI's
StatusPublished - 21-nov-2018

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