Piezoelectric enhancement of(PbTiO3)m/(BaTiO3)nferroelectric superlattices … | Zendy

Liang Hong | Zendy; Pingping Wu | Zendy; Yulan Li | Zendy; Venkatraman Gopalan | Zendy; ChangBeom Eom | Zendy; Darrell G. Schlom | Zendy; LongQing Chen | Zendy

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Piezoelectric enhancement of(PbTiO3)m/(BaTiO3)nferroelectric superlattices …

Author(s) -

Liang Hong,

Pingping Wu,

Yulan Li,

Venkatraman Gopalan,

ChangBeom Eom,

Darrell G. Schlom,

LongQing Chen

Publication year - 2014

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.90.174111

Subject(s) - ferroelectricity , monoclinic crystal system , materials science , condensed matter physics , phase diagram , piezoelectricity , physics , phase (matter) , crystallography , nuclear magnetic resonance , crystal structure , dielectric , chemistry , optoelectronics , quantum mechanics , composite material

The phase diagram of (PbTiO3)m/(BaTiO3)n ferroelectric superlattices was computed using the phase-field approach as a function of layer volume fraction and biaxial strain to tune ferroelectric properties through domain engineering. Two interesting domain structures are found: one with mixed Bloch-Neel-Ising domain wall structures and the other with stabilized monoclinic phases. The polarization of the monoclinic phase is able to rotate from out-of-plane to in-plane or vice versa under an electric field, and thus facilitates the domain reversal of rhombohedral domains. This contributes significantly to both reduced coercive fields and enhanced piezoelectric responses.

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