The frequency dependence of electromechanical behaviors of columnar-grained BaTiO3 nanofilms

Qingnan Zhang; Yu Su

doi:10.1016/j.physleta.2020.126374

The frequency dependence of electromechanical behaviors of columnar-grained BaTiO₃ nanofilms

Qingnan Zhang, Yu Su^*

^*Corresponding author for this work

School of Aerospace Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The frequency-dependent behaviors of columnar-grained ferroelectric nanofilms are rarely studied under strong AC field. We report a phase-field investigation of such problem for columnar-grained BaTiO₃ nanofilms under high-strength AC field with the frequency from 0.1 to 100 kHz. The influences from the film-substrate misfit strain, microdefects, low-permittivity surface layer and grain boundaries are taken into account. A noticeable transition from the low-frequency behavior to the high-frequency one was confirmed by observing the obtained hysteresis and butterfly loops and the change of the physical properties. The mechanism for such frequency dependence was discovered via the study of the microstructural dynamics.

Original language	English
Article number	126374
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	384
Issue number	12
DOIs	https://doi.org/10.1016/j.physleta.2020.126374
Publication status	Published - 30 Apr 2020

Keywords

Columnar grain
Ferroelectric
Frequency dependence
Nanofilm
Phase field

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10.1016/j.physleta.2020.126374

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title = "The frequency dependence of electromechanical behaviors of columnar-grained BaTiO3 nanofilms",

abstract = "The frequency-dependent behaviors of columnar-grained ferroelectric nanofilms are rarely studied under strong AC field. We report a phase-field investigation of such problem for columnar-grained BaTiO3 nanofilms under high-strength AC field with the frequency from 0.1 to 100 kHz. The influences from the film-substrate misfit strain, microdefects, low-permittivity surface layer and grain boundaries are taken into account. A noticeable transition from the low-frequency behavior to the high-frequency one was confirmed by observing the obtained hysteresis and butterfly loops and the change of the physical properties. The mechanism for such frequency dependence was discovered via the study of the microstructural dynamics.",

keywords = "Columnar grain, Ferroelectric, Frequency dependence, Nanofilm, Phase field",

author = "Qingnan Zhang and Yu Su",

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T1 - The frequency dependence of electromechanical behaviors of columnar-grained BaTiO3 nanofilms

AU - Zhang, Qingnan

AU - Su, Yu

PY - 2020/4/30

Y1 - 2020/4/30

N2 - The frequency-dependent behaviors of columnar-grained ferroelectric nanofilms are rarely studied under strong AC field. We report a phase-field investigation of such problem for columnar-grained BaTiO3 nanofilms under high-strength AC field with the frequency from 0.1 to 100 kHz. The influences from the film-substrate misfit strain, microdefects, low-permittivity surface layer and grain boundaries are taken into account. A noticeable transition from the low-frequency behavior to the high-frequency one was confirmed by observing the obtained hysteresis and butterfly loops and the change of the physical properties. The mechanism for such frequency dependence was discovered via the study of the microstructural dynamics.

AB - The frequency-dependent behaviors of columnar-grained ferroelectric nanofilms are rarely studied under strong AC field. We report a phase-field investigation of such problem for columnar-grained BaTiO3 nanofilms under high-strength AC field with the frequency from 0.1 to 100 kHz. The influences from the film-substrate misfit strain, microdefects, low-permittivity surface layer and grain boundaries are taken into account. A noticeable transition from the low-frequency behavior to the high-frequency one was confirmed by observing the obtained hysteresis and butterfly loops and the change of the physical properties. The mechanism for such frequency dependence was discovered via the study of the microstructural dynamics.

KW - Columnar grain

KW - Ferroelectric

KW - Frequency dependence

KW - Nanofilm

KW - Phase field

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M3 - Article

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SN - 0375-9601

VL - 384

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

IS - 12

M1 - 126374

ER -

The frequency dependence of electromechanical behaviors of columnar-grained BaTiO₃ nanofilms

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