Remanent polarization of evaporated films of vinylidene fluoride oligomers
Remanent polarization of evaporated films of vinylidene fluoride oligomers
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DOI：
10.1063/1.1540231
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发表时间：
2003-03
影响因子：
3.2
通讯作者：
K. Noda;K. Ishida;A. Kubono;T. Horiuchi;H. Yamada;K. Matsushige
中科院分区：
文献类型：
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作者：
K. Noda;K. Ishida;A. Kubono;T. Horiuchi;H. Yamada;K. Matsushige
合成的偏氟乙烯（VDF）低聚物[CF_3（CH_2CF_2）_（17）I]薄膜在液氮温度下蒸镀在铂表面上，获得了130±3 mC/m ~ 2的反射极化和矩形的D-E电滞曲线。结果表明，VDF低聚物薄膜具有极高的结晶度，电偶极子几乎完全垂直于薄膜表面排列，铁电VDF低聚物晶体的洛仑兹局域场因子几乎为零。此外，所获得的值的矫顽场，这是大于铁电聚合物，可能是由于空间位阻所产生的碘原子的存在下，在VDF低聚物链。
A remanent polarization of 130±3 mC/m2, large among the values reported for organic materials, and rectangular D–E hysteresis curves were realized in synthesized vinylidene fluoride (VDF) oligomer [CF3(CH2CF2)17I] film evaporated onto a platinum surface around liquid nitrogen temperature. The results suggested that the VDF oligomer film has an extremely high crystallinity, and the electric dipoles arrange almost perfectly perpendicular to the film surface, and that a Lorentz local field factor of ferroelectric VDF oligomer crystals is nearly zero. Moreover, the obtained value of the coercive field, which was larger than those of ferroelectric polymers, might be attributed to the steric hindrance arising from the existence of iodine atoms at the VDF oligomer chains.