Piezoelectric enhancement of ${(\mathrm{PbTiO}}_3{)}_m/{(\mathrm{BaTiO}}_3{)}_n$ ferroelectric superlattices through domain engineering

Journal Article · Sat Nov 01 00:00:00 EDT 2014 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.90.174111· OSTI ID:1290411

Hong, Liang; Wu, Pingping; Li, Yulan; Gopalan, Venkatraman; Eom, Chang-Beom; Schlom, Darrell G.; Chen, Long-Qing

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-Néel-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.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1290411
• Report Number(s): PNNL-SA-106499
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 90, Issue 17; ISSN 1098-0121
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

Piezoelectricity
Superlattice
Domain Engineering
Phase field method