Simultaneous and accurate measurement of the dielectric constant at many frequencies spanning a wide range

TL;DR

This paper introduces a novel method for simultaneously measuring the dielectric constant across a wide frequency range with high accuracy, suitable for dynamic studies of materials.

Contribution

The paper presents a new technique combining real-time correction, specialized excitation signals, and synchronization to measure dielectric properties at multiple frequencies simultaneously.

Findings

Achieves accuracy comparable to single-frequency methods.

Enables fast dynamic measurements of dielectric properties.

Operates over a frequency range of 10^-2 Hz to 10^4 Hz.

Abstract

We present an innovative technique which allows the simultaneous measurement of the dielectric constant of a material at many frequencies, spanning a four orders of magnitude range chosen between 10 --2 Hz and 10 4 Hz. The sensitivity and accuracy are comparable to those obtained using standard single frequency techniques. The technique is based on three new and simple features: a) the precise real time correction of the amplication of a current amplier; b) the specic shape of the excitation signal and its frequency spectrum; and c) the precise synchronization between the generation of the excitation signal and the acquisition of the dielectric response signal. This technique is useful in the case of relatively fast dynamical measurements when the knowledge of the time evolution of the dielectric constant is needed.