Orientation of crystalline dipoles in poly(vinylidene fluoride) films under electric field
作者:
D. Naegele,
D. Y. Yoon,
期刊:
Applied Physics Letters
(AIP Available online 1978)
卷期:
Volume 33,
issue 2
页码: 132-134
ISSN:0003-6951
年代: 1978
DOI:10.1063/1.90281
出版商: AIP
数据来源: AIP
摘要:
Orientation of molecular dipoles in poly(vinylidene fluoride) (PVF2) films under electric field has been measured by ir spectroscopy using ir transparent indium‐tin‐oxide electrodes. Significant changes in ir transmission with electric field have been observed at 512 and 446 cm−1, which demonstrate that crystalline dipoles in &bgr;‐phase PVF2orient along the electric field. As the field is cycled between positive and negative values, the dipole orientation exhibits a hysteresislike behavior, demonstrating that the polarization of &bgr;‐phase PVF2and its switching result directly from the orientation of crystalline dipoles. Time response of dipole orientation shows that the total orientation consists of an instantaneous part and a slowly developing part. Only the latter seems to contribute to the remnant polarization and its switching.
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