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Title: The effect of interlayer interactions on the ferroelectric-paraelectric phase transition in multilayered thin films of vinylidene fluoride-trifluoroethylene copolymers.

Abstract

The interaction between ferroelectric polymer films with different transition temperatures is evident in the effect of layer thickness on the ferroelectric-paraelectric phase transition in multilayer films, as revealed by x-ray diffraction and dielectric measurements. The multilayer samples consisted of alternating Langmuir-Blodgett (LB) films of two different copolymers of vinylidene fluoride with trifluoroethylene, one with 80% vinylidene fluoride and a ferroelectric-paraelectric transition temperature on heating of 133 {+-} 4 C and the other with 50% vinylidene fluoride and a transition temperature of 70 {+-} 4 C. Samples with a repeat period of 20 LB layers (10 contiguous layers of each composition) exhibited two distinct phase transitions, indicative of minimal interaction between the two materials. Films with a repeat period of 2, or films made from an equal mixture of the two copolymers, exhibited composite behavior, with an intermediate transition temperature and suppression of the transitions associated with the individual compositions. Films with a repeat period of 10 exhibit cross-over behavior. These results imply that the ferroelectric interaction length along the (110) direction, which is perpendicular to the film plane, is approximately 11 nm.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
914919
Report Number(s):
ANL/MSD/JA-58386
TRN: US200817%%161
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Phys. Cond. Matter; Journal Volume: 19; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; COPOLYMERS; DIELECTRIC MATERIALS; FLUORIDES; HEATING; MIXTURES; POLYMERS; THICKNESS; THIN FILMS; TRANSITION TEMPERATURE; X-RAY DIFFRACTION

Citation Formats

Kim, J., You, H., Ducharme, S., Adenwalla, S., Materials Science Division, and Univ. of Nebraska. The effect of interlayer interactions on the ferroelectric-paraelectric phase transition in multilayered thin films of vinylidene fluoride-trifluoroethylene copolymers.. United States: N. p., 2007. Web. doi:10.1088/0953-8984/19/8/086206.
Kim, J., You, H., Ducharme, S., Adenwalla, S., Materials Science Division, & Univ. of Nebraska. The effect of interlayer interactions on the ferroelectric-paraelectric phase transition in multilayered thin films of vinylidene fluoride-trifluoroethylene copolymers.. United States. doi:10.1088/0953-8984/19/8/086206.
Kim, J., You, H., Ducharme, S., Adenwalla, S., Materials Science Division, and Univ. of Nebraska. Mon . "The effect of interlayer interactions on the ferroelectric-paraelectric phase transition in multilayered thin films of vinylidene fluoride-trifluoroethylene copolymers.". United States. doi:10.1088/0953-8984/19/8/086206.
@article{osti_914919,
title = {The effect of interlayer interactions on the ferroelectric-paraelectric phase transition in multilayered thin films of vinylidene fluoride-trifluoroethylene copolymers.},
author = {Kim, J. and You, H. and Ducharme, S. and Adenwalla, S. and Materials Science Division and Univ. of Nebraska},
abstractNote = {The interaction between ferroelectric polymer films with different transition temperatures is evident in the effect of layer thickness on the ferroelectric-paraelectric phase transition in multilayer films, as revealed by x-ray diffraction and dielectric measurements. The multilayer samples consisted of alternating Langmuir-Blodgett (LB) films of two different copolymers of vinylidene fluoride with trifluoroethylene, one with 80% vinylidene fluoride and a ferroelectric-paraelectric transition temperature on heating of 133 {+-} 4 C and the other with 50% vinylidene fluoride and a transition temperature of 70 {+-} 4 C. Samples with a repeat period of 20 LB layers (10 contiguous layers of each composition) exhibited two distinct phase transitions, indicative of minimal interaction between the two materials. Films with a repeat period of 2, or films made from an equal mixture of the two copolymers, exhibited composite behavior, with an intermediate transition temperature and suppression of the transitions associated with the individual compositions. Films with a repeat period of 10 exhibit cross-over behavior. These results imply that the ferroelectric interaction length along the (110) direction, which is perpendicular to the film plane, is approximately 11 nm.},
doi = {10.1088/0953-8984/19/8/086206},
journal = {J. Phys. Cond. Matter},
number = 2007,
volume = 19,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}