Pressure-induced changes in the dielectric response of polymer relaxors

Journal Article · Mon Jan 30 00:00:00 EST 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3681372· OSTI ID:22025425

Hilczer, B ^[1]; Szafranski, M; Hilczer, A ^[2]

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1. Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznan (Poland)
2. Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznan (Poland)

The effect of hydrostatic pressure on the dielectric response of P(VDF/TrFE)(50/50) irradiated with fast electrons has been studied. A non-linear upward shift of the glass transition temperature T{sub g} and the Curie temperature T{sub C} of the polymer relaxors was observed under pressure with the initial slope dT{sub g}/dp being considerably smaller than dT{sub C}/dp. Moreover, pressure was found to reduce the contribution to the low-frequency dielectric absorption originating from segmental motions in the amorphous phase whereas the contribution related to ferroelectric-paraelectric transition and that of polar nanoclusters in the crystalline phase were found to be enhanced.

• OSTI ID: 22025425
• Journal Information: Applied Physics Letters, Vol. 100, Issue 5; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
ABSORPTION
AMORPHOUS STATE
CURIE POINT
ELECTRON BEAMS
ELECTRONS
FERROELECTRIC MATERIALS
GLASS
IRRADIATION
MOLECULAR CLUSTERS
NANOSTRUCTURES
NONLINEAR PROBLEMS
ORGANIC POLYMERS
PHASE TRANSFORMATIONS
PHYSICAL RADIATION EFFECTS
POLYMERS
PRESSURE DEPENDENCE