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Piezoelectric enhancement under negative pressure.

ABSTRACT: Enhancement of ferroelectric properties, both spontaneous polarization and Curie temperature under negative pressure had been predicted in the past from first principles and recently confirmed experimentally. In contrast, piezoelectric properties are expected to increase by positive pressure, through polarization rotation. Here we investigate the piezoelectric response of the classical PbTiO3, Pb(Zr,Ti)O3 and BaTiO3 perovskite ferroelectrics under negative pressure from first principles and find significant enhancement. Piezoelectric response is then tested experimentally on free-standing PbTiO3 and Pb(Zr,Ti)O3 nanowires under self-sustained negative pressure, confirming the theoretical prediction. Numerical simulations verify that negative pressure in nanowires is the origin of the enhanced electromechanical properties. The results may be useful in the development of highly performing piezoelectrics, including lead-free ones.

SUBMITTER: Kvasov A

PROVIDER: S-EPMC4942569 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature

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Piezoelectric enhancement under negative pressure.

Kvasov Alexander A McGilly Leo J LJ Wang Jin J Shi Zhiyong Z Sandu Cosmin S CS Sluka Tomas T Tagantsev Alexander K AK Setter Nava N

Nature communications 20160711

Enhancement of ferroelectric properties, both spontaneous polarization and Curie temperature under negative pressure had been predicted in the past from first principles and recently confirmed experimentally. In contrast, piezoelectric properties are expected to increase by positive pressure, through polarization rotation. Here we investigate the piezoelectric response of the classical PbTiO3, Pb(Zr,Ti)O3 and BaTiO3 perovskite ferroelectrics under negative pressure from first principles and find ...[more]

PMID: 27396411

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