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Uncovering ferroelectric polarization in tetragonal (Bi1/2K1/2)TiO3-(Bi1/2Na1/2)TiO3 single crystals.

ABSTRACT: We report the robust ferroelectric properties of (1?-?x)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3 (x?=?33%) single crystals grown by a top-seeded solution growth process under a high oxygen-pressure (0.9?MPa) atmosphere. The sample exhibit a large remanent polarization of 48??C/cm2 and a sizeable piezoelectric strain constant of 460?pm/V. Neutron powder diffraction structural analysis combined with first-principles calculations reveals that the large ferroelectric polarization comparable to PbTiO3 stems from the hybridization between Bi-6p and O-2p orbitals at a moderately negative chemical pressure.

SUBMITTER: Kitanaka Y

PROVIDER: S-EPMC6917808 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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Uncovering ferroelectric polarization in tetragonal (Bi1/2K1/2)TiO3-(Bi1/2Na1/2)TiO3 single crystals.

Kitanaka Yuuki Y Noguchi Yuji Y Miyayama Masaru M

Scientific reports 20191217 1

We report the robust ferroelectric properties of (1 - x)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3 (x = 33%) single crystals grown by a top-seeded solution growth process under a high oxygen-pressure (0.9 MPa) atmosphere. The sample exhibit a large remanent polarization of 48 μC/cm2 and a sizeable piezoelectric strain constant of 460 pm/V. Neutron powder diffraction structural analysis combined with first-principles calculations ...[more]

PMID: 31848370

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